C111123313331323113313331333133313331323133112132313231323133323311   >>    C11112331333132311331333133313331333132313311213231323132313332331   <<    C111123313331323113313331333133313331323133112132313231323133323313   >>      C111123313331323113313331333133313331323133112132313231323133323312   >>