import java.io.IOException;
import java.io.InputStreamReader;

/**
 * Count the number of times the 
 */
public class CharCount {
    public static void main(String[] args) throws IOException {
        // Wrap with object that will convert bytes to characters.
        InputStreamReader r = new InputStreamReader(System.in);
        int charInput = 0;
        // Repeatedly read the next character until EOF.
        while ( (charInput = r.read()) != -1 ) {
            // Cast input to char type to treat as letter.
            char c = (char)charInput;
            // Convert to lower case and ensure it's a letter.
            c = Character.toLowerCase(c);
            if (!(c >= 'a' && c <= 'z'))
                continue;
            // ...
        }
    }
}