# Ordered Fractions

Source : USACO Gateway |
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Time limit : 3 sec |
Memory limit : 32 M |

**Submitted** : 1546, **Accepted** : 512

Consider the set of all reduced fractions between 0 and 1 inclusive with denominators less than or equal to N.

Here is the set when N = 5:

0/1 1/5 1/4 1/3 2/5 1/2 3/5 2/3 3/4 4/5 1/1

Write a program that, given an integer N between 1 and 160 inclusive, prints the fractions in order of increasing magnitude.

### INPUT FORMAT

Several lines with a single integer N in each line. Process to the end of file.### SAMPLE INPUT

5 5

### OUTPUT FORMAT

One fraction per line, sorted in order of magnitude. print a blank line after each testcase.### SAMPLE OUTPUT

0/1 1/5 1/4 1/3 2/5 1/2 3/5 2/3 3/4 4/5 1/1 0/1 1/5 1/4 1/3 2/5 1/2 3/5 2/3 3/4 4/5 1/1