感谢大佬

#include <cstdio>
#include <cstring>

const char ch[] = "`1234567890-=QWERTYUIOP[]\\ASDFGHJKL;'ZXCVBNM,./";

int main(){
	
	char a;
	while((a=getchar()) != EOF){
		if(a==' ')printf(" ");
		for(int i = 0; i < strlen(ch); i++){
			if(a==ch[i]){
				printf("%c",ch[i-1]);
				break;
			}
		}
	}
	return 0;
}