#include <stdio.h>

void squeeze(char s1[], char s2[]);
int main() {
	char sent[] = "I am a ssssnake!", banned[] = "as";
	squeeze(sent,banned);
	printf("Result: %s", sent);
	return 0;
}
void squeeze(char s1[], char s2[]) {
	int i,j,k,s; // i is writing position and k is reading position
	for (i = 0, k = 0; s1[k] != '\0'; k++) {
		for (s = 0, j = 0; s2[j] != '\0'; j++) {
			// We check if we have a disallowed character and break if it is the case
			if (s1[k] == s2[j]) {
				s = 1;
				break;
			}
		}
		if (!s) {
			s1[i++] = s1[k]; // As long as the character is not disallowed, write it and increase the write position
		}
	}
	s1[i] = '\0';
}