pat-1005.cpp

// http://pat.zju.edu.cn/contests/pat-a-practise/1005
#include <algorithm>
#include <string>
#include <cstdio>
#include <cassert>
#include <cstring>
#include <cstdlib>

using namespace std;
const char* tbl[] = {
  "zero",	 "one", 	"two", 
  "three",	 "four", 	"five",
  "six",	 "seven",	"eight",
  "nine"
};
  
int main() {
  const int klen = 105;
  char str[klen];
  scanf("%s", str);
  int len = strlen(str);
  int sum = std::accumulate(str, str + len, 0,
                  [](int init, char ch) {
                    return init + ch - '0';
                  });
  
  char ans[klen];
  len = sprintf(ans, "%d", sum);
  for (int i = 0; i < len; ++i) {
    printf("%s%s", tbl[ans[i] - '0'], i == len - 1 ? "\n": " ");
  }
  return 0;
}