C111123313331323113313331333133313231323133312111112111111321333132313223311   >>    C11112331333132311331333133313331323132313331211111211111132133313231322331   <<    C111123313331323113313331333133313231323133312111112111111321333132313223313   >>      C111123313331323113313331333133313231323133312111112111111321333132313223312   >>