1. 同音代換加密法

namespace Q1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            var data = """
      09 12 33 47 53 67 78 92
      48 81
      13 41 62
      01 03 45 79
      14 16 24 44 46 55 57 64 74 82 87 98
      10 31
      06 25
      23 39 50 56 65 68
      32 70 73 83 88 93
      15
      """.Split("\n").Select(e => e.Split(" ").Select(int.Parse).ToList()).ToList();

            string o = "";
            Dictionary<char, int> freq = new Dictionary<char, int>();
            foreach (var item in textBox1.Text)
            {
                var c = (char)(item - 'a');
                int f = freq.GetValueOrDefault(c, 0);
                o += (data[c][f % data[c].Count]).ToString().PadLeft(2, '0') + " ";
                freq[c] = f + 1;
            }

            if (o.Length != 0) o = o.Substring(0, o.Length - 1);
            textBox2.Text = o;
        }
    }
}