import java.util.List;

public class Cusip {
    private static Boolean isCusip(String s) {
        if (s.length() != 9) return false;
        int sum = 0;
        for (int i = 0; i <= 7; i++) {
            char c = s.charAt(i);

            int v;
            if (c >= '0' && c <= '9') {
                v = c - 48;
            } else if (c >= 'A' && c <= 'Z') {
                v = c - 55;  // lower case letters apparently invalid
            } else if (c == '*') {
                v = 36;
            } else if (c == '@') {
                v = 37;
            } else if (c == '#') {
                v = 38;
            } else {
                return false;
            }
            if (i % 2 == 1) v *= 2;  // check if odd as using 0-based indexing
            sum += v / 10 + v % 10;
        }
        return s.charAt(8) - 48 == (10 - (sum % 10)) % 10;
    }

    public static void main(String[] args) {
        List<String> candidates = List.of(
                "037833100", "17275R102", "38259P508", "594918104", "68389X106", "68389X105", "EXTRACRD8",
                "EXTRACRD9", "BADCUSIP!", "683&9X106", "68389x105", "683$9X106", "68389}105", "87264ABE4"
        );
        for (String candidate : candidates) {
            System.out.printf("%s -> %s%n", candidate, isCusip(candidate) ? "correct" : "incorrect");
        }
    }
}