#include <iostream> using namespace std; int main() { string st; getline(cin,st); int n = st.size(), letters = 0, blanks = 0, numbers = 0, others = 0; for(int i=0; i<n; i++){ if((st[i] >= 'a' && st[i] <= 'z') || (st[i] >= 'A' && st[i] <= ...