C1111233131211111211113313331333133313232321333133312113313131121   >>    C111123313121111121111331333133313331323232133313331211331313112   <<    C1111233131211111211113313331333133313232321333133312113313131123   >>      C1111233131211111211113313331333133313232321333133312113313131122   >>