C1111233131211111211113313231333133313331323331333133313332223232133313231221   >>    C111123313121111121111331323133313331333132333133313331333222323213331323122   <<    C1111233131211111211113313231333133313331323331333133313332223232133313231223   >>      C1111233131211111211113313231333133313331323331333133313332223232133313231222   >>