int main() {
char str [LEN];
int I;
int as,a=0,b=0,c=0,d=0,e=0,f=0,g=0,i=0,h=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;
scanf("%s",str);
as=strlen(str);
for (I=0;I<as;I++){
if (str[I]=='a'){
a++;
}else if (str[I]=='b'){
b++;
}else if (str[I]=='c'){
c++;
}else if (str[I]=='d'){
d++;
}else if (str[I]=='e'){
e++;
}else if (str[I]=='f'){
f++;
}else if (str[I]=='g'){
g++;
}else if (str[I]=='h'){
h++;
}else if (str[I]=='i'){
i++;
}else if (str[I]=='j'){
j++;
}else if (str[I]=='k'){
k++;
}else if (str[I]=='l'){
l++;
}else if (str[I]=='m'){
m++;
}else if (str[I]=='n'){
n++;
}else if (str[I]=='o'){
o++;
}else if (str[I]=='p'){
p++;
}else if (str[I]=='q'){
q++;
}else if (str[I]=='r'){
r++;
}else if (str[I]=='s'){
s++;
}else if (str[I]=='t'){
t++;
}else if (str[I]=='u'){
u++;
}else if (str[I]=='v'){
v++;
}else if (str[I]=='w'){
w++;
}else if (str[I]=='x'){
x++;
}else if (str[I]=='y'){
y++;
}else if (str[I]=='z'){
z++;
}
}
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(a==0&&b==0&&c==0&&d==0&&e==0&&f==0&&g==0&&i==0&&h==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){
printf("No\n");
}

return 0;
}