C111123313331323113313331333133313121111133112121111331323132313223322311   >>    C11112331333132311331333133313331312111113311212111133132313231322332231   <<    C111123313331323113313331333133313121111133112121111331323132313223322313   >>      C111123313331323113313331333133313121111133112121111331323132313223322312   >>