C1111233131211111211113313331333133313232321333133313331313311113213221   >>    C111123313121111121111331333133313331323232133313331333131331111321322   <<    C1111233131211111211113313331333133313232321333133313331313311113213223   >>      C1111233131211111211113313331333133313232321333133313331313311113213222   >>