#include <iostream>
#include <fstream>
#include <cstring>
#include <cmath>
using namespace std;
// ifstream fin ("bac.txt");
// ofstream fout("iesire.txt");
int main(){
    char s[255];
    char voc[]="AEIOU";
    char *p;
    int i, nr=0, fr[150]={0};
    cin.get(s,255);
    char s2[255];
    strcpy(s2,s);
    p=strtok(s," ");
    while(p){
        nr++;
        p=strtok(NULL," ");
    }
    for(i=0;i<strlen(s2);++i){
        if(strchr(voc,s2[i])==NULL){
            fr[(int)s2[i]]=1;
        }
    }
    cout<<nr<<endl;
    for(i=(int)'A';i<=(int)'Z';++i){
        if(fr[i]==1){
            cout<<(char)fr[i]<<" ";
        }
    }
//  fin.close();
//  fout.close();
    return 0;
}