D21221323131123313131333132233131133131323223313232212121111331323133313232121   >>    D2122132313112331313133313223313113313132322331323221212111133132313331323212   <<    D21221323131123313131333132233131133131323223313232212121111331323133313232123   >>      D21221323131123313131333132233131133131323223313232212121111331323133313232122   >>