# your code goes here
import numpy as np
# a = [[],[],[]]
# print(a)
# print(a[0])
# print(a[1])
# print(a[2])
# asd = "as"
# a[2].append({asd:"sddf"})
# a[0].append("bbb")
# print(a[2][0])
# print(a[2][0].items())
b=[[{}],[{}]]
b[0][0]["aa"]=[]
b[0][0]["bb"]=[]
b[1][0]["cc"]=[]
print(b)
IyB5b3VyIGNvZGUgZ29lcyBoZXJlCmltcG9ydCBudW1weSBhcyBucAojIGEgPSBbW10sW10sW11dCiMgcHJpbnQoYSkKIyBwcmludChhWzBdKQojIHByaW50KGFbMV0pCiMgcHJpbnQoYVsyXSkKIyBhc2QgPSAiYXMiCiMgYVsyXS5hcHBlbmQoe2FzZDoic2RkZiJ9KQojIGFbMF0uYXBwZW5kKCJiYmIiKQojIHByaW50KGFbMl1bMF0pCiMgcHJpbnQoYVsyXVswXS5pdGVtcygpKQoKYj1bW3t9XSxbe31dXQpiWzBdWzBdWyJhYSJdPVtdCmJbMF1bMF1bImJiIl09W10KYlsxXVswXVsiY2MiXT1bXQpwcmludChiKQ==