import sys import math x1 = 0 y1 = 0 x2 = 199 y2 = 0 x3 = 0 y3 = 199 x4 = 199 y4 = 199 xlim = 200 ylim = 200 xlast = True ylast = True def scanx(x): for y in range(200): sys.stdout.flush() sys.stdout.write(str(x) + " " + str(y) + "\n") line = sys.stdin.readline() alt = int(line.strip()) if alt == 0: return True return False def scany(y): for x in range(200): sys.stdout.flush() sys.stdout.write(str(x) + " " + str(y) + "\n") line = sys.stdin.readline() alt = int(line.strip()) if alt == 0: return True return False while altitude != 0: sys.stdout.flush() sys.stdout.write(str(x1) + " " + str(y1) + "\n") line = sys.stdin.readline() alt1 = int(line.strip()) sys.stdout.flush() sys.stdout.write(str(x2) + " " + str(y2) + "\n") line = sys.stdin.readline() alt2 = int(line.strip()) sys.stdout.flush() sys.stdout.write(str(x3) + " " + str(y3) + "\n") line = sys.stdin.readline() alt3 = int(line.strip()) sys.stdout.flush() sys.stdout.write(str(x4) + " " + str(y4) + "\n") line = sys.stdin.readline() alt4 = int(line.strip()) if(alt1 == 0 or alt2 == 0 or alt3 == 0 or alt4 == 0): break if alt1 * alt2 > 0: x1 += 1 x2 += 1 else: scanx(x1) if alt1 * alt3 > 0: y1 += 1 y3 += 1 else: scany(y1) if alt3 * alt4 >0: x3 -= 1 x4 -= 1 else: scanx(x3) if alt4 * alt2 > 0: y4 -= 1 y2 -= 1 else: scany(y4)