def mrF(alg, times = 1):
if times % 2 == 0:
return alg
elif alg == 'R':
return "L'"
elif alg[0] == 'G':
return alg
elif alg[-1] == "'":
return alg[:-1]
elif alg[-1] == '2':
return alg
else:
return alg + "'"
ZGVmIG1yRihhbGcsIHRpbWVzID0gMSk6CiAgICBpZiB0aW1lcyAlIDIgPT0gMDoKICAgICAgICByZXR1cm4gYWxnCiAgICBlbGlmIGFsZyA9PSAnUic6CiAgICAgICAgcmV0dXJuICJMJyIKICAgIGVsaWYgYWxnWzBdID09ICdHJzoKICAgICAgICByZXR1cm4gYWxnCiAgICBlbGlmIGFsZ1stMV0gPT0gIiciOgogICAgICAgIHJldHVybiBhbGdbOi0xXQogICAgZWxpZiBhbGdbLTFdID09ICcyJzoKICAgICAgICByZXR1cm4gYWxnCiAgICBlbHNlOgogICAgICAgIHJldHVybiBhbGcgKyAiJyI=