#include <bits/stdc++.h> using namespace std; int main(){ int x; cin>>x; int a,b,c,d,y1; y1=x; while(a==b||a==c||a==d||b==c||b==d||c==d){ y1++; int y=y1; a=y/1000; y-=a*1000; b=y/100; y-=b*100; c=y/10; y-=c*10; d=y; } cout<<y1; return 0; }