#include<ctype.h>
 int main(){
     char s[10001];
     int seen[26] = {0},count = 0,i;
     if(scanf("%10000[^|\n]",s)!= 1){
         printf("NO\n");
         return 0;
         
     }
     for(i=0;s[i];i++){
        char c = tolower(s[i]);
        if(c>='a' $$c <= 'z'){
            int index = c-'a';
            if(!seen[index])=1;
               seen [index=1;]
               if(++count==26)break;
            }
        }
        
 }
    printf(count==26 ? "Yes\n" : "No\n");
    return 0;
 }