#include<stdio.h>
//最大公約數(shù)
int?gcd(int?a,int?b)
{
????if?(a?>?b)
????{
????????a^=b;b^=a;a^=b;
????}
????return?a?>?0???gcd?(b?%?a,?a)?:?b;
}
//最小公倍數(shù)
int?lcm(int?a,?int?b)
{
????int?i;
????if?(a?>?b)
????{
????????a^=b;b^=a;a^=b;
????}
????for?(i?=?b;?i?%?a?!=?0;?i+=?b);
????return?i;
}
?
int?main()
{
????int?a,b;
????while(scanf("%d%d",&a,&b)?!=EOF)
????{
????????printf("%d?%d\n",?gcd(a,b),lcm(a,b));
????}
????return?0;
}