C1111233131211111211113313331333133313232321333133313231331122132211321   >>    C111123313121111121111331333133313331323232133313331323133112213221132   <<    C1111233131211111211113313331333133313232321333133313231331122132211323   >>      C1111233131211111211113313331333133313232321333133313231331122132211322   >>