void setup() {
  // put your setup code here, to run once:
 Serial.begin(9600);
  for(int i=0; i<10; i++)
  for(int j=0;j<5;j++)
    Serial.print(i);
    Serial.println(j);
    delay(1000);

}

void loop() {
  // put your main code here, to run repeatedly:

}