#include<iostream> #include<string> using namespace std; int main(){ string s; getline(cin, s); // 含空格的一行输入要用getline char c, d; cin >> c; if (islower(c)) { d = c - 'a' + 'A'; } else{ d = c - 'A' + 'a'; } int ans = 0; for (int i = 0; i < s.size(); ++i) { if (s[i] == c || s[i] == d) ans++; } cout << ans << endl; return 0; }