solid

@echo off
SETLOCAL ENABLEDELAYEDEXPANSION
for /f "tokens=*" %%a in ( a.txt ) do (
set ti1=%%a
set "ti=!ti1:他娘的=TND!"
echo !ti! >>b.txt
)
del a.txt
ren b.txt a.txt
for /f "tokens=*" %%a in ( a.txt ) do (
set ti1=%%a
set "ti=!ti1:TND=!"
echo !ti! >>b.txt
)
del a.txt
ren b.txt a.txt