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+<!DOCTYPE HTML>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<html><head>
+  <meta charset="utf-8">
+  <title>Reference: mixed align-content/self:baseline/last baseline</title>
+  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1256429">
+  <link rel="stylesheet" type="text/css" href="support/ahem.css">
+  <style type="text/css">
+html,body {
+    color:black; background-color:white; font-size:16px; font-family: Ahem; padding:0; margin:0;
+}
+
+.grid {
+  float: left;
+  display: grid;
+  grid: 100px / repeat(10, auto);
+  border: 2px solid;
+  margin: 1px;
+  align-content: start;
+  justify-content: end;
+}
+.c {
+  grid: repeat(4, auto) / 100px;
+  align-content: end;
+  justify-content: start;
+}
+.t2 { grid: 100px / repeat(3, auto);}
+
+span { 
+  background: lime;
+  display: inline-block;
+  border: 1px solid black;
+}
+
+span:nth-child(1) { font-size:32px; }
+span:nth-child(2) { font-size:12px; }
+span:nth-child(3) { font-size:10px; }
+span:nth-child(4) { font-size:24px; }
+
+.pbs { padding-block-start: 15px; margin-block-start: 5px; }
+.pbe { padding-block-end: 7px; margin-block-end: 3px; }
+
+.fb { place-self:first baseline self-start; }
+.lb { place-self:last baseline self-end; }
+.s  { justify-self:stretch; }
+
+.sfb { align-self:baseline; }
+.slb { align-self:last baseline; align-content:self-end;}
+
+.hl { writing-mode: horizontal-tb; direction:ltr; }
+.hr { writing-mode: horizontal-tb; direction:rtl; }
+.vl { writing-mode: vertical-lr; text-orientation: sideways; }
+.vr { writing-mode: vertical-rl; text-orientation: sideways; }
+.vlr { writing-mode: vertical-lr; direction:rtl; text-orientation: sideways; }
+.vrl { writing-mode: vertical-rl; direction:ltr; text-orientation: sideways; }
+
+</style>
+</head>
+<body>
+
+<div class="grid hl"><span class="sfb">A<br>B</span><span style="padding-block-start:16px" class="fb">M<br>N</span><span style="padding-block-start:17px; padding-block-end:57px" class="fb s">X<br>Z</span></div>
+<div class="grid hl"><span class="sfb pbe">A<br>B</span><span style="padding-block-start:16px" class="fb">M<br>N</span><span style="padding-block-start:17px; padding-block-end:57px" class="fb s">X<br>Z</span></div>
+<div class="grid vl"><span class="sfb">A<br>B</span><span style="padding-block-start:4px" class="fb">M<br>N</span><span style="padding-block-start:4px; padding-block-end:70px" class="fb s">X<br>Z</span></div>
+<div class="grid vl"><span class="sfb pbs">A<br>B</span><span style="padding-block-start:24px" class="fb">M<br>N</span><span style="padding-block-start:24px; padding-block-end:50px" class="fb s">X<br>Z</span></div>
+<div class="grid vr"><span class="sfb">A<br>B</span><span style="padding-block-start:16px" class="fb">M<br>N</span><span style="padding-block-start:17px; padding-block-end:57px" class="fb s">X<br>Z</span></div>
+<div class="grid vr"><span class="sfb pbe">A<br>B</span><span style="padding-block-start:16px" class="fb">M<br>N</span><span style="padding-block-start:17px; padding-block-end:57px" class="fb s">X<br>Z</span></div>
+
+<br clear="all">
+
+<div class="grid hl"><span class="slb">A<br>B</span><span style="padding-block-end:4px" class="lb">M<br>N</span></div>
+<div class="grid hl"><span class="slb pbe">A<br>B</span><span style="padding-block-end:14px" class="lb">M<br>N</span></div>
+<div class="grid vl"><span class="slb">A<br>B</span><span style="padding-block-end:16px" class="lb">M<br>N</span></div>
+<div class="grid vl"><span class="slb pbs">A<br>B</span><span style="padding-block-end:16px" class="lb">M<br>N</span></div>
+<div class="grid vr"><span class="slb">A<br>B</span><span style="padding-block-end:4px" class="lb">M<br>N</span></div>
+<div class="grid vr"><span class="slb pbe">A<br>B</span><span style="padding-block-end:14px" class="lb">M<br>N</span></div>
+
+<br clear="all">
+
+<div class="grid hl"><span class="sfb">A<br>B</span><span style="padding-block-start:16px" class="fb">M<br>N</span><span style="padding-block-end:2px" class="lb">X<br>Z</span><span class="slb">R<br>S</span></div>
+<div class="grid hl"><span class="sfb pbe">A<br>B</span><span style="padding-block-start:16px" class="fb">M<br>N</span><span style="padding-block-end:2px" class="lb">X<br>Z</span><span class="slb">R<br>S</span></div>
+<div class="grid vl"><span class="sfb">A<br>B</span><span style="padding-block-start:4px" class="fb">M<br>N</span><span style="padding-block-end:11px" class="lb">X<br>Z</span><span class="slb">R<br>S</span></div>
+<div class="grid vl"><span class="sfb pbs">A<br>B</span><span style="padding-block-start:24px" class="fb">M<br>N</span><span style="padding-block-end:11px" class="lb">X<br>Z</span><span class="slb">R<br>S</span></div>
+<div class="grid vr"><span class="sfb">A<br>B</span><span style="padding-block-start:16px" class="fb">M<br>N</span><span style="padding-block-end:2px" class="lb">X<br>Z</span><span class="slb">R<br>S</span></div>
+<div class="grid vr"><span class="sfb pbe">A<br>B</span><span style="padding-block-start:16px" class="fb">M<br>N</span><span style="padding-block-end:2px" class="lb">X<br>Z</span><span class="slb">R<br>S</span></div>
+
+<br clear="all">
+
+<div class="grid hl"><span class="slb">A<br>B</span><span style="padding-block-end:4px" class="lb">M<br>N</span><span class="fb">X<br>Z</span><span class="slb">R<br>S</span></div>
+<div class="grid hl"><span class="slb pbe">A<br>B</span><span style="padding-block-end:14px" class="lb">M<br>N</span><span class="fb">X<br>Z</span><span style="padding-block-end:12px" class="lb">R<br>S</span></div>
+<div class="grid vl"><span class="slb">A<br>B</span><span style="padding-block-end:16px" class="lb">M<br>N</span><span class="fb">X<br>Z</span><span class="slb">R<br>S</span></div>
+<div class="grid vl"><span class="slb pbs">A<br>B</span><span style="padding-block-end:16px" class="lb">M<br>N</span><span class="fb">X<br>Z</span><span style="padding-block-end:6px" class="lb">R<br>S</span></div>
+<div class="grid vr"><span class="slb">A<br>B</span><span style="padding-block-end:4px" class="lb">M<br>N</span><span class="fb">X<br>Z</span><span class="slb">R<br>S</span></div>
+<div class="grid vr"><span class="slb pbe">A<br>B</span><span style="padding-block-end:14px" class="lb">M<br>N</span><span class="fb">X<br>Z</span><span class="slb">R<br>S</span></div>
+
+<br clear="all">
+
+
+<div class="grid t2 hl"><span class="slb">A<br>B</span><span style="padding-block-end:4px" class="lb">M<br>N</span><span class="vl sfb">R<br>S</span><span class="vl fb">U<br>V</span><span style="align-self:stretch" class="vr fb s">X<br>Z</span><span class="vr sfb">K<br>L</span></div>
+<div class="grid t2 hl"><span class="slb pbe">A<br>B</span><span style="padding-block-end:14px" class="lb">M<br>N</span><span class="vl sfb">R<br>S</span><span class="vl fb">U<br>V</span><span style="align-self:stretch" class="vl fb s">X<br>Z</span><span class="vr sfb">K<br>L</span></div>
+<div class="grid t2 vl"><span class="slb">A<br>B</span><span style="padding-block-end:16px" class="lb">M<br>N</span><span class="hr sfb">R<br>S</span><span class="hl fb">U<br>V</span><span style="align-self:stretch" class="hr fb s">X<br>Z</span><span class="hr sfb">K<br>L</span></div>
+<br clear="all">
+<div class="grid t2 vl"><span class="slb pbs">A<br>B</span><span style="padding-block-end:16px" class="lb">M<br>N</span><span style="padding-block-end:0px" class="hr lb">R<br>S</span><span class="hl fb">U<br>V</span><span class="hl sfb s">X<br>Z</span><span class="hl slb">K<br>L</span></div>
+<div class="grid t2 vr"><span class="slb">A<br>B</span><span style="padding-block-end:4px" class="lb">M<br>N</span><span class="hl fb">R<br>S</span><span class="hl fb">U<br>V</span><span class="hl sfb s">X<br>Z</span><span class="hl sfb s">X<br>Z</span><span class="hl slb">K<br>L</span></div>
+<div class="grid t2 vr"><span class="slb pbe">A<br>B</span><span style="padding-block-end:14px" class="lb">M<br>N</span><span class="hl fb">R<br>S</span><span class="hl fb">U<br>V</span><span style="align-self:stretch" class="hl fb s">X<br>Z</span><span class="hl sfb s">X<br>Z</span><span class="hl slb">K<br>L</span></div>
+
+<br clear="all">
+
+
+
+</body>
+</html>