#39634: c++答案
yp11251144@yphs.tp.edu.tw
(911-38曾湛)
#include <bits/stdc++.h>
using namespace std;
int main()
{
int count=1, length=1,pos;
string s;
cin>>s;
for(int i=1; i<s.length(); i++){
if(s[i]-s[i-1]==1) count++;
else count=1;
if(count>=length) {length=count; pos=i-count+1;}
}
cout<<length<<" "<<s.substr(pos, length)<<"\n";
}