#include <cstdio> #include <cstring> using namespace std; #define BSIZE 65536 int p,t,i,c1,k,c2; char str[BSIZE]; int main() { #ifndef ONLINE_JUDGE freopen("a.in","r",stdin); freopen("a.out","w",stdout); #endif while (!(str[0]=='0' && k==1 && c1==0 && c2==0)) { scanf("%s",str); k=strlen(str); scanf("%d %d",&c1,&c2); for (i=0;i<k;++i) if (str[i]==c1+'0') str[i]=c2+'0'; i=0; while (str[i]=='0') ++i; for (;i<k;++i) printf("%c",str[i]); printf("\n"); } return 0; }