from collections import deque


db_list = deque(range(16))
node1list = []
node2list = []
node3list = []


while len(db_list) > 0:
    if len(node1list) < 5:
        node1list.append(db_list.popleft())
    elif len(node2list) < 5:
        node2list.append(db_list.popleft())
    elif len(node3list) < 5:
        node3list.append(db_list.popleft())