#include <string>
#include <iostream>

int main(int argc, char* argv[])
{
  std::cout << "Enter a string: " << std::endl;

  std::string str;
  std::getline(std::cin, str, '\n');

  int a, e, i, o, u;
  a = e = i = o = u = 0;

  for (int j = 0; j != str.length(); ++j)
  {
    switch (str.at(j))
    {
      case 'a': a++;
      case 'e': e++;
      case 'i': i++;
      case 'o': o++;
      case 'u': u++;
      default: 
        break;
    }
  }

  if (a > 0) std::cout << "a = " << a << std::endl;
  if (e > 0) std::cout << "e = " << e << std::endl;
  if (i > 0) std::cout << "i = " << i << std::endl;
  if (o > 0) std::cout << "o = " << o << std::endl;
  if (u > 0) std::cout << "u = " << u << std::endl;

  return 0;
}