250912

# n=int(input())
# sum=0
# for i in range(1, n//2+1):
#     for j in range(1, i+1):
#         for k in range(1, j+1):
#             if i<j+k and i+j+k==n:
#                 sum+=1
# print(sum)

arr=[]
n=int(input())
for i in range(161):
b=[]*i
arr.append(b)
for i in range(1, n+1):
    for j in range(1, i+1):
        if i%j!=0 or j==1:
            arr[i]=arr[]
            print (j,'/', i)