C111123313331323113313331333133313331323131211113313121111331333131333132311331   >>    C11112331333132311331333133313331333132313121111331312111133133313133313231133   <<    C111123313331323113313331333133313331323131211113313121111331333131333132311333   >>      C111123313331323113313331333133313331323131211113313121111331333131333132311332   >>