int main(int argc, char* argv[])
{
 char S[100];
 int value = 0;
 int a=0,b=0,c=0,d=0,e=0,f=0,g=0,h=0,i=0,j=0,k=0,l=0,m=0,n=0,o=0,p=0,q=0,r=0,s=0,t=0,u=0,v=0,w=0,x=0,y=0,z=0;
 gets(S);
 int I = 0;
 int T=strlen(S);
 for (I=0;I<T;I++)
 {
	 if (S[I]=='a'){
		a++;
		value++;
	 }
	 if (S[I]=='b'){
		b++;
		value++;
	 }
	 if (S[I]=='c'){
		c++;
		value++;
	 }
	 if (S[I]=='d'){
		d++;
		value++;
	 }
	 if (S[I]=='e'){
		e++;
		value++;
	 }
	 if (S[I]=='f'){
		f++;
		value++;
	 }
	 if (S[I]=='g'){
		g++;
		value++;
	 }
     if (S[I]=='h'){
		h++;
		value++;
	 }
	 if (S[I]=='i'){
		i++;
		value++;
	 }
	 if (S[I]=='j'){
		j++;
		value++;
	 }
	 if (S[I]=='k'){
		k++;
		value++;
	 }
	 if (S[I]=='l'){
		 l++;
		 value++;
	 }
	 if (S[I]=='m'){
		 m++;
		 value++;
	 }
	 if (S[I]=='n'){
		 n++;
		 value++;
	 }
	 if (S[I]=='o'){
		 o++;
		 value++;
	 }
     if (S[I]=='p'){
		 p++;
		 value++;
	 }
	 if (S[I]=='q'){
		 q++;
		 value++;
	 }
	 if (S[I]=='r'){
		 r++;
		 value++;
	 }
	 if (S[I]=='s'){
		 s++;
		 value++;
	 }
	 if (S[I]=='t'){
		 t++;
		 value++;
	 }
	 if (S[I]=='u'){
		 u++;
		 value++;
	 }
	 if (S[I]=='v'){
		 v++;
		 value++;
	 }
	 if (S[I]=='w'){
		 w++;
		 value++;
	 }
     if (S[I]=='x'){
		 x++;
		 value++;
	 }
	 if (S[I]=='y'){
		 y++;
		 value++;
	 }
     if (S[I]=='z'){
		 z++;
		 value++;
	 }
 }
 if (a!=0)
  printf("a=%d\n",a);
  if (b!=0)
  printf("b=%d\n",b);
 if (c!=0)
  printf("c=%d\n",c);
 if (d!=0)
  printf("d=%d\n",d);
 if (e!=0)
  printf("e=%d\n",e);
 if (f!=0)
  printf("f=%d\n",f);
 if (g!=0)
  printf("g=%d\n",g);
 if (h!=0)
  printf("h=%d\n",h);
 if (i!=0)
  printf("i=%d\n",i);
 if (j!=0)
  printf("j=%d\n",j);
 if (k!=0)
  printf("k=%d\n",k);
 if (l!=0)
  printf("l=%d\n",l);
 if (m!=0)
  printf("m=%d\n",m);
 if (n!=0)
  printf("n=%d\n",n);
 if (o!=0)
  printf("o=%d\n",o);
 if (p!=0)
  printf("p=%d\n",p);
 if (q!=0)
  printf("q=%d\n",q);
 if (r!=0)
  printf("r=%d\n",r);
    if (s!=0)
  printf("s=%d\n",s);
 if (t!=0)
  printf("t=%d\n",t);
 if (u!=0)
  printf("u=%d\n",u);
 if (v!=0)
  printf("v=%d\n",v);
 if (w!=0)
  printf("w=%d\n",w);
 if (x!=0)
  printf("x=%d\n",x);
 if (y!=0)
  printf("y=%d\n",y);
 if (z!=0)
  printf("z=%d\n",z);

 if( value == 0 ){
  printf("No\n");
 }
 
 
 return 0;
}