C11231123231313231323131323132322331323132322121111132313232211   >>    C1123112323131323132313132313232233132313232212111113231323221   <<    C11231123231313231323131323132322331323132322121111132313232213   >>      C11231123231313231323131323132322331323132322121111132313232212   >>