D1122211211331313331323221123313233313112211232233131333131232321   >>    D112221121133131333132322112331323331311221123223313133313123232   <<    D1122211211331313331323221123313233313112211232233131333131232323   >>      D1122211211331313331323221123313233313112211232233131333131232322   >>