C11111211113313112113313331333133313331333132313331333133313231321123122321   >>    C1111121111331311211331333133313331333133313231333133313331323132112312232   <<    C11111211113313112113313331333133313331333132313331333133313231321123122323   >>      C11111211113313112113313331333133313331333132313331333133313231321123122322   >>