p=[2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,101,
103,107,109,113,127,131,137,139,149,151,157,163,167,173,179,181,193,197,211,
223,227,229,239,233,241,251,257,263,269,271,277,281,283,293,307,311,313,317,331,
337,353,367,373,379,383,389,397,401,433,443,449,457,479,487,491,499,503,521,
523,547,557,569,577,587,601,617,659,673,691,709,727,751,827,881,937]
while 1:
i=0
l=raw_input().split('/')
n=int(l[0])
d=int(l[1])
while i<len(p):
if n%p[i]==0 and d%p[i]==0:
n=n/p[i]
d=d/p[i]
else:i+=1
if d==1:print n
else:print '%d/%d'%(n,d)
Note that non-ascii characters in the above source code will be escaped (such as \x9f).