C11112331312111112111133132313331323331323223313231333132213111   >>    C1111233131211111211113313231333132333132322331323133313221311   <<    C11112331312111112111133132313331323331323223313231333132213113   >>      C11112331312111112111133132313331323331323223313231333132213112   >>