const int ba = 0;
const int bb = 1;
const int bc = 2;
const int bd = 3;
const int be = 4;
const int bf = 5;
const int bg = 6;
const int bh = 7;
const int bi = 9;
const int bj = 10;
const int bk = 11;
const int bl = 12;
const int bm = 13;
const int bn = A4;
const int bo = A5;

int a = 0;
int b = 0;
int c = 0;
int d = 0;
int e = 0;
int f = 0;
int g = 0;
int h = 0;
int i = 0;
int j = 0;
int k = 0;
int l = 0;
int m = 0;
int n = 0;
int o = 0;

void setup() {
  pinMode(ba, INPUT);
  pinMode(bb, INPUT);
  pinMode(bc, INPUT);
  pinMode(bd, INPUT);
  pinMode(be, INPUT);
  pinMode(bf, INPUT);
  pinMode(bg, INPUT);
  pinMode(bh, INPUT);
  pinMode(bi, INPUT);
  pinMode(bj, INPUT);
  pinMode(bk, INPUT);
  pinMode(bl, INPUT);
  pinMode(bm, INPUT);
  pinMode(bn, INPUT);
  pinMode(bo, INPUT);
  Serial.begin(9600);

}

void loop(){
  a = digitalRead(ba);
  b = digitalRead(bb);
  c = digitalRead(bc);
  d = digitalRead(bd);
  e = digitalRead(be);
  f = digitalRead(bf);
  g = digitalRead(bg);
  h = digitalRead(bh);
  i = digitalRead(bi);
  j = digitalRead(bj);
  k = digitalRead(bk);
  l = digitalRead(bl);
  m = digitalRead(bm);
  n = digitalRead(bn);
  o = digitalRead(bo);

  if(a == HIGH)
  {
    char x[4] = "a1";
   Serial.print(x);
  }
  if(b == HIGH)
  {
    char x[4] = "b1";
    Serial.print(x);
  }
  if(c == HIGH)
  {
    char x[4] = "c1";
    Serial.print(x);
  }
  if(d == HIGH)
  {
    char x[4] = "d1";
    Serial.print(x);
  }
  if(e == HIGH)
  {
    char x[4] = "e1";
    Serial.print(x);
  }
  if(f == HIGH)
  {
    char x[4] = "f1";
    Serial.print(x);
  }
  if(g == HIGH)
  {
    char x[4] = "g1";
    Serial.print(x);
  }
  if(h == HIGH)
  {
    char x[4] = "h1";
    Serial.print(x);
  }
  if(i == HIGH)
  {
    char x[4] = "i1";
    Serial.print(x);
  }
  if(j == HIGH)
  {
    char x[4] = "j1";
    Serial.print(x);
  }
  if(k == HIGH)
  {
    char x[4] = "k1";
    Serial.print(x);
  }
  if(l == HIGH)
  {
    char x[4] = "l1";
    Serial.print(x);
  }
  if(m == HIGH)
  {
    char x[4] = "m1";
    Serial.print(x);
  }
  if(n == HIGH)
  {
    char x[4] = "n1";
    Serial.print(x);
  }
  if(o == HIGH)
  {
    char x[4] = "o1";
    Serial.print(x);
  }
  Serial.println();
}