C21221212121323223313131323131333132313132332313232233132312111   >>    C2122121212132322331313132313133313231313233231323223313231211   <<    C21221212121323223313131323131333132313132332313232233132312113   >>      C21221212121323223313131323131333132313132332313232233132312112   >>