C111123313331323113313331333133313331323133121111331323211331323221311   >>    C11112331333132311331333133313331333132313312111133132321133132322131   <<    C111123313331323113313331333133313331323133121111331323211331323221313   >>      C111123313331323113313331333133313331323133121111331323211331323221312   >>