int main()
{
	char str[300];
	int word[27];
	int i,S=0;
	scanf("%s",str);
	for(i=0;i<27;i++){
		word[i]=0;
	}
	for(i = 0 ; i<strlen(str) ; i++){
		if(str[i]=='a'){
			word[1]++;
		}
		if(str[i]=='b'){
			word[2]++;
		}
		if(str[i]=='c'){
			word[3]++;
		}
		if(str[i]=='d'){
			word[4]++;
		}
		if(str[i]=='e'){
			word[5]++;
		}
		if(str[i]=='f'){
			word[6]++;
		}
		if(str[i]=='g'){
			word[7]++;
		}
		if(str[i]=='h'){
			word[8]++;
		}
		if(str[i]=='i'){
			word[9]++;
		}
		if(str[i]=='j'){
			word[10]++;
		}
		if(str[i]=='k'){
			word[11]++;
		}
		if(str[i]=='l'){
			word[12]++;
		}
		if(str[i]=='m'){
			word[13]++;
		}
		if(str[i]=='n'){
			word[14]++;
		}
		if(str[i]=='o'){
			word[15]++;
		}
		if(str[i]=='p'){
			word[16]++;
		}
		if(str[i]=='q'){
			word[17]++;
		}
		if(str[i]=='r'){
			word[18]++;
		}
		if(str[i]=='s'){
			word[19]++;
		}
		if(str[i]=='t'){
			word[20]++;
		}
		if(str[i]=='u'){
			word[21]++;
		}
		if(str[i]=='v'){
			word[22]++;
		}
		if(str[i]=='w'){
			word[23]++;
		}
		if(str[i]=='x'){
			word[24]++;
		}
		if(str[i]=='y'){
			word[25]++;
		}
		if(str[i]=='z'){
			word[26]++;
		}
	}
	for(i=1;i<27;i++){
		S+=word[i];
	}
	if(S==0){
		printf("No\n");
	}
	if(word[1]!=0){
		printf("a=%d\n",word[1]);
	}
	if(word[2]!=0){
		printf("b=%d\n",word[2]);
	}
	if(word[3]!=0){
		printf("c=%d\n",word[3]);
	}
	if(word[4]!=0){
		printf("d=%d\n",word[4]);
	}
	if(word[5]!=0){
		printf("e=%d\n",word[5]);
	}
	if(word[6]!=0){
		printf("f=%d\n",word[6]);
	}
	if(word[7]!=0){
		printf("g=%d\n",word[7]);
	}
	if(word[8]!=0){
		printf("h=%d\n",word[8]);
	}
	if(word[9]!=0){
		printf("i=%d\n",word[9]);
	}
	if(word[10]!=0){
		printf("j=%d\n",word[10]);
	}
	if(word[11]!=0){
		printf("k=%d\n",word[11]);
	}
	if(word[12]!=0){
		printf("l=%d\n",word[12]);
	}
	if(word[13]!=0){
		printf("m=%d\n",word[13]);
	}
	if(word[14]!=0){
printf("n=%d\n",word[14]);
	}
	if(word[15]!=0){
		printf("o=%d\n",word[15]);
	}
	if(word[16]!=0){
		printf("p=%d\n",word[16]);
	}
	if(word[17]!=0){
		printf("q=%d\n",word[17]);
	}
	if(word[18]!=0){
		printf("r=%d\n",word[18]);
	}
	if(word[19]!=0){
		printf("s=%d\n",word[19]);
	}
	if(word[20]!=0){
		printf("t=%d\n",word[20]);
	}
	if(word[21]!=0){
		printf("u=%d\n",word[21]);
	}
	if(word[22]!=0){
		printf("v=%d\n",word[22]);
	}
	if(word[23]!=0){
		printf("w=%d\n",word[23]);
	}
	if(word[24]!=0){
		printf("x=%d\n",word[24]);
	}
	if(word[25]!=0){
		printf("y=%d\n",word[25]);
	}
	if(word[26]!=0){
		printf("z=%d\n",word[26]);
	}
    return 0;
}


