#include <bits/stdc++.h>
using namespace std;
int main(){ string s; while(cin >> s){ int a[26] = {0}; for(int i = 0; i<s.length(); i++){ if(64 < s[i] && s[i] < 91) a[s[i]-65]++; else if(96 < s[i] && s[i] < 123) a[s[i]-97]++; } int cnt = 0; for(int i = 0; i<26; i++) if(a[i]%2 != 0) cnt++; if(cnt <= 1) cout << "yes !" << endl; else cout << "no..." << endl; }
return 0;}
#include
using namespace std;
int main(){string s;while(cin >> s){int a[26] = {0};for(int i = 0; iif(64 < s[i] && s[i] < 91) a[s[i]-65]++;else if(96 < s[i] && s[i] < 123) a[s[i]-97]++;}int cnt = 0;for(int i = 0; i<26; i++) if(a[i]%2 != 0) cnt++;if(cnt <= 1) cout << "yes !" << endl;else cout << "no..." << endl;}
return 0;}
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