bash-pure, 94 bytes

Result

AC

Duration

5914ms

Code [DL]

IFS=
f(){
read -n1 x
x=`printf %o \'$x`
printf \\$[1/(~a&5),i=i%51+1,a=c[i]|=x?x|a&1:12]
f
}
f

stdin

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                    K                             

stdout

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                    Q!!!!!!!!!!!!!!!!U

stderr

/code.bash: line 5: 1/(~a&5),i=i%51+1,a=c[i]|=x?x|a&1:12: division by 0 (error token is "(~a&5),i=i%51+1,a=c[i]|=x?x|a&1:12")

strace