D21221323131123313131333132233131323133313233211113313232211211   >>    D2122132313112331313133313223313132313331323321111331323221121   <<    D21221323131123313131333132233131323133313233211113313232211213   >>      D21221323131123313131333132233131323133313233211113313232211212   >>