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main (n)
{
  float r, i, R, I, b;
  for (i = -1; i < 1; i += .06, puts (""))
    for (r = -2; I = i, (R = r) < 1; r += .03, putchar (n + 31))
      for (n = 0; b = I * I, 26 > n++ && R * R + b < 4;
        I = 2 * R * I + i, R = R * R - b + r);
}