#include <bits/stdc++.h>
#define int long long
using namespace std;
int a,b;
inline int read(){
    int ret=0,ff=1;char ch=getchar();
    while(!isdigit(ch)){if(ch=='-')ff=-1;ch=getchar();}
    while(isdigit(ch)){ret=ret*10+(ch^48);ch=getchar();}
    return ret*ff;
}
signed main(){
    a=read(),b=read();
    int g=__gcd(a,b);
    a/=g,b/=g;
    for(int i=1;i*b<=1000000;i++){
        int tot=i*a;
        if(tot>=i*b-1&&tot<=i*b*(i*b-1)/2){
            printf("%lld %lld\n",i*b,i*b-1);
            for(int j=1;j<i*b;j++){
                if(tot>=j*(j-1)/2+(i*b-j)&&tot<=j*(j+1)/2+(i*b-j-1)){
                    for(int k=1;k<j;k++){
                        printf("%lld %lld\n",k,k+1);
                    }
                    int rem=tot-(j*(j-1)/2)-(i*b-j);
                    // assert(rem>=0);
                    for(int k=1;k<=i*b-j;k++){
                        if(rem){
                            printf("%lld %lld\n",j+k,min(j-1,rem)+1);
                            rem-=min(j-1,rem);
                        }
                        else printf("%lld %lld\n",j+k,1ll);
                    }
                }
            }
            return 0;
        }
    }
    printf("impossible");
    return 0;
}