C1111233131211111211113313231333133313331323221211111333133322212331   >>    C111123313121111121111331323133313331333132322121111133313332221233   <<    C1111233131211111211113313231333133313331323221211111333133322212333   >>      C1111233131211111211113313231333133313331323221211111333133322212332   >>