C3121113331313231323132333131313231323131323223313233313232332313231323221211   >>    C312111333131323132313233313131323132313132322331323331323233231323132322121   <<    C3121113331313231323132333131313231323131323223313233313232332313231323221213   >>      C3121113331313231323132333131313231323131323223313233313232332313231323221212   >>