import 'dart:io';
 
void main() {
  tekaTekiTeko(30);
}
 
void tekaTekiTeko(int batas) {
  // tidak boleh negatif
  if (batas < 0) {
    throw new ArgumentError("Parameter harus unsigned integer (>= 0).");
  }
 
  // minimal 20
  if (batas < 20) {
    throw new ArgumentError("Parameter harus bernilai minimal 20.");
  }
 
  for (int i = 1; i <= batas; i++) {
    bool d2 = (i % 2 == 0);
    bool d3 = (i % 3 == 0);
    bool d5 = (i % 5 == 0);
 
    if (d2 && d3 && d5) {
      print("TekaTekiTeko");
    } else if (d2 && d3) {
      print("TekaTeki");
    } else if (d2 && d5) {
      print("TekaTeko");
    } else if (d3 && d5) {
      print("TekiTeko");
    } else if (d2) {
      print("Teka");
    } else if (d3) {
      print("Teki");
    } else if (d5) {
      print("Teko");
    } else {
      print(i);
    }
  }
}
 

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