def solution(s):
# answer = ''
answer = []
big = []
for i in s:
answer.append(i)
finalen = "".join(answer)
final = len(finalen)
for finalnum in range(final):
if (finalnum%2) == 0:
big.append(finalen[finalnum].upper())
elif (finalnum % 2) == 1:
big.append(finalen[final_num])
bigger = "".join(big)
return bigger