We first arrange this list of phrases by increasing length , then order all phrases of equal length lexicographically ( in dictionary order , e.g. we can use the ASCII code , the phrases can only contain codes 32 to 126 ) .
The ordering is canonical .
We first arrange this list of phrases by increasing length , then order all phrases of equal length lexicographically ( in dictionary order , e.g. we can use the ASCII code , the phrases can only contain codes 32 to 126 ) , so that the ordering is canonical .