C11112331312111112111133133313231333133313311211331313331333132332211   >>    C1111233131211111211113313331323133313331331121133131333133313233221   <<    C11112331312111112111133133313231333133313311211331313331333132332213   >>      C11112331312111112111133133313231333133313311211331313331333132332212   >>