1029. 旧键盘(20)

#include<stdio.h>
#include<string.h>
	int main(){
		char kirby[40] = {0};
		char zqd[81] = {0};
		char gr[81] = {0};
		scanf("%s",zqd);
		scanf("%s",gr);
		for (int i = 0;i < 81;i++){
			if('a' <= zqd[i]&&zqd[i] <= 'z'){
				zqd[i] -= 32;
			}
			if('a' <= gr[i]&&gr[i] <= 'z'){
				gr[i] -= 32;
			}
		}
		int j = 0;
		int t = 0;
		for (int i = 0;zqd[i] != 0;i++){
			if (zqd[i] != gr[j]){
				if (strchr(kirby,zqd[i]) == NULL){
					kirby[t] = zqd[i];
					t++;
				}
			}else{
				j++;
			}
		}
		printf("%s",kirby);
		return 0;
	}