What Is Your Name Score?

Given an uppercase name, sum the alphabetical position of each letter and print the total.

Easy1StringImplementationInterviewNo attempts yetTime limit1sMemory limit128 MB

Description

Examples2

Problem

The name score is the sum of the scores of every uppercase letter in a name. The score table follows alphabetical order, that is, $A=1, B=2, C=3, \dots, Z=26$ .

For a name $SUNGPIL$ , the score is $S(19)+U(21)+N(14)+G(7)+P(16)+I(9)+L(12)=98$ . For a name $SOYOON$ , the score is $S(19)+O(15)+Y(25)+O(15)+O(15)+N(14)=103$ .

Given a name, write a program that computes its name score.

Input

The first line contains the length $N$ of the name. $N$ is a positive integer not exceeding 100.

The second line contains the name of length $N$ . It consists of uppercase letters only, with no spaces.

Output

Print the name score of the given name on the first line.