<gh_stars>1000+
import uuid

def gen(num, len):
	L = []
	for i in range(num):
		ran = str(uuid.uuid4()).replace('-', '')[:len]
		if not ran in L:
			L.append(ran)
	return L

if __name__ == '__main__':
	for item in gen(200, 16):
		print(item)
		
import uuid

def gen(num, len):
	L = []
	for i in range(num):
		ran = str(uuid.uuid4()).replace('-', '')[:len]
		if not ran in L:
			L.append(ran)
	return L

if __name__ == '__main__':
	for item in gen(200, 16):
		print(item)