C1111233131211111211113313331333133313231121133212331333132212323231   >>    C111123313121111121111331333133313331323112113321233133313221232323   <<    C1111233131211111211113313331333133313231121133212331333132212323233   >>      C1111233131211111211113313331333133313231121133212331333132212323232   >>