include <bits/stdc++.h>

using namespace std;

int beautiful_year(int y) { int flag=0,i=0,digit[10],j=0; while(y) { digit[i++]=y%10; y=y/10; } int size=sizeof(digit)/sizeof(digit[0]); for(i=0;i<size;i++) { for(j=i;j<size;j++) { if(digit[i]==digit[j]) return 0; else flag=1;
} } if(flag==1) return 1; else return 0; } int main() { int year; cin>>year; year++; while(year) { if(beautiful_year(year)) { cout<<year; break; } year++; } return 0; }