void main()
{  int i;
   int m=0;
	char c[301];
	scanf("%s",c);
	char a[26]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
	for(i=0;i<=strlen(c)-1;i++)
	{if(c[i]>=97&&c[i]<=122)a[c[i]-97]=a[c[i]-97]+1;}
    for(i=0;i<=25;i++)m=m+a[i];
	if(m==0)printf("No");
		else{
		       for(i=0;i<=25;i++)
			   {if(a[i]!=0)printf("%c=%d\n",i+97,a[i]);}
	}
}