cobat

@echo off
(
echo ,x,y,z
for %%a in (*.txt) do (
    <nul set/p=%%~na
    for %%b in (x,y,z) do (
        for /f "delims=xyz=" %%c in ('findstr "%%b=" "%%a"') do <nul set/p=,%%c
    )
    echo,
)
)>b.csv
pause
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