/**
* Reads in text from standard input; calculates the frequency of
* occurrence of each character over the alphabet specified as a
* commmand-line argument; and prints the frequencies to standard
* output.
*
* @param args the command-line arguments
*/
public static void main(String[] args) {
Alphabet alphabet = new Alphabet(args[0]);
final int R = alphabet.radix();
int[] count = new int[R];
while (StdIn.hasNextChar()) {
char c = StdIn.readChar();
if (alphabet.contains(c))
count[alphabet.toIndex(c)]++;
}
for (int c = 0; c < R; c++)
StdOut.println(alphabet.toChar(c) + " " + count[c]);
}