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- #include <bits/stdc++.h>
- using namespace std;
- int main()
- {
- string in_string, second_string;
- getline(cin, in_string);
- int j = 0, count = 1;
- int size_in = in_string.size();
- for(int i = 0; i < size_in; i++)
- {
- if(in_string[i]<123 && in_string[i]>96)
- {
- second_string[j]=in_string[i];
- j++;
- }
- }
- int size_second = second_string.size();
- for(int i = 0; i < size_second; i++)
- {
- for(int j = 0; j < size_second; j++)
- {
- if(second_string[i]==second_string[j])
- {
- break;
- }
- if(i==j)
- {
- count++;
- }
- }
- }
- cout<<count;
- }
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