#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int i,j; cin>>i>>j; for(int i,j=1;i,j<=n;i,j=i,j+1) cout<<i<<j<<endl; return 0; }