C1111233133313231133133313231333133313113313113313231333131211111213322121   >>    C111123313331323113313331323133313331311331311331323133313121111121332212   <<    C1111233133313231133133313231333133313113313113313231333131211111213322123   >>      C1111233133313231133133313231333133313113313113313231333131211111213322122   >>