D1122112312233231312323132322331323223313331123123231323132313221   >>    D112211231223323131232313232233132322331333112312323132313231322   <<    D1122112312233231312323132322331323223313331123123231323132313223   >>      D1122112312233231312323132322331323223313331123123231323132313222   >>