C11111211113313112113313331333133313331333132313331333133313113313231123311   >>    C1111121111331311211331333133313331333133313231333133313331311331323112331   <<    C11111211113313112113313331333133313331333132313331333133313113313231123313   >>      C11111211113313112113313331333133313331333132313331333133313113313231123312   >>