bash-pure, 98 bytes

Result

WA

Duration

1536ms

Code [DL]

sed '1h
1!{$!g
${x
:1
/T /{s/T /T/;x;s/K /K/;x}
t1
:2
/ T/{x;/K /{x;s/ T/T/;x;s/K /KK/};x}
t2
x}}'

stdin

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                            K                     

stdout

stderr

/code.bash: line 10: sed: command not found

strace