C111123313331323113313331323133313331333132331112111111211312311   >>    C11112331333132311331333132313331333133313233111211111121131231   <<    C111123313331323113313331323133313331333132331112111111211312313   >>      C111123313331323113313331323133313331333132331112111111211312312   >>