#include <stdio.h>

void squeeze(char s1[], char s2[]);

void main()
{
    char s1[] = "hellodk";
    char s2[] = "leh";
    squeeze(s1,s2);
}

void squeeze(char s1[], char s2[])
{
    int L = strlen(s1), k = 0;
    for (int i = 0; i < L; i++)
    {
        for (int j = 0; s2[j] != '\0'; j++)
            if (s1[i] == s2[j])
            {
                s1[i] = '\0';
                break;
            }
    }

    for (int i = 0; i < L; i++)
        if (s1[i]) s1[k++] = s1[i];
    s1[k] = 0;
    printf("%s\n", s1);
    return;
}