#include<stdio.h> #include<string.h> int main() { char s[1001]; int a = {0}, sum = 0; while(gets(s)) { sum = 0; for(int i = 0; i < strlen(s); i++) { if(s[i] >= 97) s[i] = s[i] - 32; // 转换为大写字母 if(!a[s[i] - 65]) { a[s[i] - 65] = 1; sum++; } if(sum == 26) break; // 若已找到26个不同字母则提前结束循环 } if(sum == 26) printf("Yes\n"); else printf("No\n"); } return 0; }