# arr=['mahmud','hossain','nannu']
# for x in arr:
#     print(x)

# # make  a empty array datastructure 
# arr=[]
# arr=input('inter an number:')
# print(arr)

# for x in arr:
#     print(x)

# arr=[]
# lol=input('enter first:')
# # pol=input('enter second :')
# # arr=lol
# arr=pol
# print(arr)