C1111233131211111211113313231333133313331323221211111333131121313311211   >>    C111123313121111121111331323133313331333132322121111133313112131331121   <<    C1111233131211111211113313231333133313331323221211111333131121313311213   >>      C1111233131211111211113313231333133313331323221211111333131121313311212   >>