C11112331312111112111133132313331323331323223313231333132313211   >>    C1111233131211111211113313231333132333132322331323133313231321   <<    C11112331312111112111133132313331323331323223313231333132313213   >>      C11112331312111112111133132313331323331323223313231333132313212   >>