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#include<iostream>
#include<cmath>
#include<algorithm>
#include<string>
using namespace std;
int main()
{
string s;
while (getline(cin, s)) {
int arr[26] = { 0 };
for (int i = 0;i < s.length();i++) {
if (s[i] >= 'A' && s[i] <= 'Z') {
arr[s[i] - 65]++;
}
}
for (int i = 0;i < 26;i++) {
cout << char(65 + i) << ":" << arr[i] << endl;
}
}
return 0;
}
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