C11111211113313112113313331333133313331333132313331333132322121111331313233121   >>    C1111121111331311211331333133313331333133313231333133313232212111133131323312   <<    C11111211113313112113313331333133313331333132313331333132322121111331313233123   >>      C11111211113313112113313331333133313331333132313331333132322121111331313233122   >>