a = int(input())
# array = list (map(int, input().split()))
# array.reverse()
# for i in range(len(array)):
# print(array[i],end=' ')
# a = input()
# array = list(map(int,input().split()))
# print(min(array))
# a = input()
# array = list(map(int,input().split()))
#
# list[1] ~ list[23] 이 모두 0인 리스트 만들기
# list = []
# for i in range(24):
# list.append(0)
#
# for i in range(len(array)):
# list [ array[i] ] +=1
# # print(array[i])
# for i in range(1,24):
# print(list[i],end=' ')
# a =int(input())
# array = list(map(int,input().split()))
# for i in range(a):
# for j in range(i,a):
# print(array[j],end=' ')
# for j in range(0,i):
# print(array[j],end=' ')
# print()
# array = list(map(int,input().split()))
# a =int(input())
# print(array[a-1])
# list = list(map(int, input(). split()))
# sum = 0
# for i in range(10):
# sum = sum + list[i]
# print(sum/10)
# sum2 = 0
# for i in range(10):
# if list[i] >= sum/10:
# sum2 = sum2 + 1
# print(sum2,10-sum2)
a = int(input())
list = list(map(int, input(). split()))
for i in range(a):
print(i+1,':',sep = ' ' )
# a = int(input())
# array = list (map(int, input().split()))
# array.reverse()
# for i in range(len(array)):
# print(array[i],end=' ')
# a = input()
# array = list(map(int,input().split()))
# print(min(array))
# a = input()
# array = list(map(int,input().split()))
#
# list[1] ~ list[23] 이 모두 0인 리스트 만들기
# list = []
# for i in range(24):
# list.append(0)
#
# for i in range(len(array)):
# list [ array[i] ] +=1
# # print(array[i])
# for i in range(1,24):
# print(list[i],end=' ')
# a =int(input())
# array = list(map(int,input().split()))
# for i in range(a):
# for j in range(i,a):
# print(array[j],end=' ')
# for j in range(0,i):
# print(array[j],end=' ')
# print()
# array = list(map(int,input().split()))
# a =int(input())
# print(array[a-1])
# list = list(map(int, input(). split()))
# sum = 0
# for i in range(10):
# sum = sum + list[i]
# print(sum/10)
# sum2 = 0
# for i in range(10):
# if list[i] >= sum/10:
# sum2 = sum2 + 1
# print(sum2,10-sum2)
a = int(input())
list = list(map(int, input(). split()))
for i in range(a):
print(i+1,':',sep = ' ' )