package IntroAndBasicSyntax;

import java.util.Scanner;

public class Messages {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int tapTimes = Integer.parseInt(scanner.nextLine());


        for (int i = 0; i < tapTimes; i++) {
            String input = scanner.nextLine();


                int numberOfDigits = input.length();
                char buttonNumber = input.charAt(0);

                if (buttonNumber == '2') {
                    if (numberOfDigits == 1) {
                        System.out.print("a");
                    } else if (numberOfDigits == 2) {
                        System.out.print("b");
                    } else if (numberOfDigits == 3) {
                        System.out.print("c");
                    }
                } else if (buttonNumber == '3') {
                    if (numberOfDigits == 1) {
                        System.out.print("d");
                    } else if (numberOfDigits == 2) {
                        System.out.print("e");
                    } else if (numberOfDigits == 3) {
                        System.out.print("f");
                    }
                } else if (buttonNumber == '4') {
                    if (numberOfDigits == 1) {
                        System.out.print("g");
                    } else if (numberOfDigits == 2) {
                        System.out.print("h");
                    } else if (numberOfDigits == 3) {
                        System.out.print("i");
                    }
                } else if (buttonNumber == '5') {
                    if (numberOfDigits == 1) {
                        System.out.print("j");
                    } else if (numberOfDigits == 2) {
                        System.out.print("k");
                    } else if (numberOfDigits == 3) {
                        System.out.print("l");
                    }
                } else if (buttonNumber == '6') {
                    if (numberOfDigits == 1) {
                        System.out.print("m");
                    } else if (numberOfDigits == 2) {
                        System.out.print("n");
                    } else if (numberOfDigits == 3) {
                        System.out.print("o");
                    }
                } else if (buttonNumber == '7') {
                    if (numberOfDigits == 1) {
                        System.out.print("p");
                    } else if (numberOfDigits == 2) {
                        System.out.print("q");
                    } else if (numberOfDigits == 3) {
                        System.out.print("r");
                    } else if (numberOfDigits == 4) {
                        System.out.print("s");
                    }
                } else if (buttonNumber == '8') {
                    if (numberOfDigits == 1) {
                        System.out.print("t");
                    } else if (numberOfDigits == 2) {
                        System.out.print("u");
                    } else if (numberOfDigits == 3) {
                        System.out.print("v");
                    }
                } else if (buttonNumber == '9') {
                    if (numberOfDigits == 1) {
                        System.out.print("w");
                    } else if (numberOfDigits == 2) {
                        System.out.print("x");
                    } else if (numberOfDigits == 3) {
                        System.out.print("y");
                    } else if (numberOfDigits == 4) {
                        System.out.print("z");
                    }
                } else if (buttonNumber == '0') {
                    System.out.print(" ");
                }
            }
        }
    }