{{ $letters := split "ABCDEFGHIJKLMNOPQRSTUVWXYZ" "" }}
{{ range $.Site.Pages.ByTitle }}
{{ $firstChar := substr .Title 0 1 | upper }}
{{ if $firstChar | in $letters }}
{{ $curLetter := $.Scratch.Get "curLetter" }}
{{ if ne $firstChar $curLetter }}
{{ $.Scratch.Set "curLetter" $firstChar }}
{{ $firstChar }}