#define A i=0;i<n;i++
main(n,i){char s[10][21],t[10][21];scanf("%d",&n);for(A)scanf("%s",s[i]);for(A)scanf("%s",t[i]);for(A)if(strcmp(s[i],t[i])){printf("%d\n%s\n%s",i+1,s[i],t[i]);break;}}