#include <bits/stdc++.h>

using namespace std; long long A,B=10,a,a1,b,b1,judge=1; int main () { cin>>A; if(A>=10 && A<100){ a=A/10; a1=A-10a; while(B<100){ b=B/10; b1=B%10; if(B+A==a+10a1+b+b110 && B%10!=0){ cout<<B<<endl; judge=0; } B=B+1; if(BA || B10a1+a ){ B=B+1; } } if(judge==1){ cout<<"No"; } } else{ cout<<"No"; } return 0; }