#include <stdio.h> #include <ctype.h> int main() { char c; int letters = 0, spaces = 0, digits = 0, others = 0; while ((c = getchar()) != '\n') { if (isalpha(c)) { letters++; } else if (isspace(c)) { spaces++; } else if (isdigit(c)) { digits++; } else { others++; } } printf("%d %d %d %d\n", letters, spaces, digits, others); return 0; }