C222123232321333131133133313331323133313231313231312223313221221   >>    C22212323232133313113313331333132313331323131323131222331322122   <<    C222123232321333131133133313331323133313231313231312223313221223   >>      C222123232321333131133133313331323133313231313231312223313221222   >>