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#include <stdio.h>
#include <string.h>
#include <ctype.h>

int vowel (char c) {
    c = tolower(c);
    return (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u');
}

void kode(char input[]) {
    int b = strlen(input);
    char huruf[17]; 
    int index = 0;

    for (int i = 0; i < b; i++) {
        if (!vowel(input[i])) {
            huruf[index++] = toupper(input[i]);
        }
    }

    if (index == 0) {
        huruf[index++] = 'X';
    }

    huruf[index] = '\0';
    printf("Singkatan: %s\n", huruf);
}

int main() {
    char input[100];
    printf("Masukkan nama kota >> ");
    scanf("%99[^\n]", input);

    kode(input);

    return 0;
}