def a(a):
    b=0
    for i in range(1,a):
        if a%i==0:
            b+=i
    return b
c=[]
for i in range(1,10000):
    if a(a(i))==i and i not in c and i!=a(i):
        print(i,a(i))
        c.append(i)
        c.append(a(i))