#include 

int main() {
    char str[1001], ret[1001];
    scanf("%s", str);
    int index = 0;
    for (char i = 'A'; i <= 'Z'; i++) {
        int j = 0;
        while (str[j] != '\0') {
            if (str[j] == i || str[j] - i == 32) {
                ret[index++] = str[j];
            }
            j++;
        }
    }
    index = 0;
    int k = 0;
    while (str[k] != '\0') {
        if ((str[k] >= 'a' && str[k] <= 'z') || (str[k] >= 'A' && str[k] <= 'Z')) {
            str[k] = ret[index++];
        }
        printf("%c", str[k]);
        k++;
    }
    return 0;
}