#include<iostream>
using namespace std;
int a,b;
int c;
int a2=a;
int b2=b;
int main()
{
cout<<"a=";cin>>a;
cout<<"b=";cin>>b;
if(a<0){a=-1*a;}
if(b<0){b=-1*b;}
while ( (a!=0)&& (b!=0))
{
    if (a>=b)  { a=a-b;}
    else            { b=b-a;}
  }
if (a==0) c=b;
else            c=a;
cout<<"cmmdc"<<c;
}