#include <iostream>

void count_r_b(int* num_r_b, char s)
{
  if (s == 114 || s == 82)
  {
    num_r_b[0] += 1;
  }
  else
  {
    num_r_b[1] += 1;
  }
}


int main(void)
{
  int num_r_b[2];
  char s_0[4], s_1[4], s_2[4];
  scanf("%s", s_0);
  scanf("%s", s_1);
  scanf("%s", s_2);
  num_r_b[0]=0;
  num_r_b[1]=0;
  count_r_b(num_r_b, s_0[0]);
  count_r_b(num_r_b, s_1[0]);
  count_r_b(num_r_b, s_2[0]);
  if (num_r_b[0] > num_r_b[1])
  {
    printf("%s\n", "RED");
  }
  else
  {
    printf("%s\n", "BLUE");
  }
}