import sys
import random

if __name__=="__main__":
	heldBack = open('tabuData.txt', 'w')
	workingSet = open('workingSet.txt', 'w')
	prob = 0.1
	count = 0

	for line in sys.stdin:
		if random.random()<prob:
			heldBack.write(line)
		else:
			workingSet.write(line)
	heldBack.close()
	workingSet.close()