C1111233131211111211113313331333133313231121133212331333132212122321   >>    C111123313121111121111331333133313331323112113321233133313221212232   <<    C1111233131211111211113313331333133313231121133212331333132212122323   >>      C1111233131211111211113313331333133313231121133212331333132212122322   >>