C1111233133313231133133313231333133313113313113313331323133322123211111   >>    C111123313331323113313331323133313331311331311331333132313332212321111   <<    C1111233133313231133133313231333133313113313113313331323133322123211113   >>      C1111233133313231133133313231333133313113313113313331323133322123211112   >>