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Powershell :

gc 0.txt|%{if($_ -match '^(.*)(,\w+){3},1,'){$n+=($matches[1])}};$($n -join ',')>ref.log
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bat

@echo off
for /f "tokens=1,5 delims=," %%a in (0.txt) do if %%b==1 call set "n=%%a,%%n%%"
(call echo %%n:~0,-1%%)>ref.log
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