C1111233131211111211113313331333133313211231211331323133313331322122211   >>    C111123313121111121111331333133313331321123121133132313331333132212221   <<    C1111233131211111211113313331333133313211231211331323133313331322122213   >>      C1111233131211111211113313331333133313211231211331323133313331322122212   >>