D1122211211331313331323221123313233313231323112113313233313231333133313221111   >>    D112221121133131333132322112331323331323132311211331323331323133313331322111   <<    D1122211211331313331323221123313233313231323112113313233313231333133313221113   >>      D1122211211331313331323221123313233313231323112113313233313231333133313221112   >>