D1212121221323132313232332313232233131133131323223313231323131231231111   >>    D121212122132313231323233231323223313113313132322331323132313123123111   <<    D1212121221323132313232332313232233131133131323223313231323131231231113   >>      D1212121221323132313232332313232233131133131323223313231323131231231112   >>