D1122112312233231312323132322331311331323132311331323223313221123231   >>    D112211231223323131232313232233131133132313231133132322331322112323   <<    D1122112312233231312323132322331311331323132311331323223313221123233   >>      D1122112312233231312323132322331311331323132311331323223313221123232   >>