C1111233131211111211113313331333133313331313221131211111211331322211221   >>    C111123313121111121111331333133313331333131322113121111121133132221122   <<    C1111233131211111211113313331333133313331313221131211111211331322211223   >>      C1111233131211111211113313331333133313331313221131211111211331322211222   >>