C11111211113313112113313331333133313331333132313331333133313231211331   >>    C1111121111331311211331333133313331333133313231333133313331323121133   <<    C11111211113313112113313331333133313331333132313331333133313231211333   >>      C11111211113313112113313331333133313331333132313331333133313231211332   >>