#include <assert.h>
#include <ctype.h>
#include <inttypes.h>
#include <limits.h>
#include <stdio.h>
 
int main(void)
{
  // count chars
  uintmax_t count_lower = 0, count_upper = 0;
  for (int c; (c = getchar()) != EOF; ) {
    assert(c >= 0 && c <= UCHAR_MAX); // otherwise UB in ctype functions
    if (isupper(c)) // C locale
      ++count_upper;
    else if (islower(c))
      ++count_lower;
  }
  printf("upper: %ju, lower: %ju\n", count_upper, count_lower);
  return !feof(stdin); // success on eof
}
 

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