# 7μ₯ Lab λμ λ¬Έμ νμ΄
338p_Lab λμ λ¬Έμ )
phrase = input('λ¬Έμμ΄μ μ
λ ₯νμμ€: ')
phrase = phrase.replace("In","")
phrase = phrase.replace("The","")
phrase = phrase.replace("Of","")
phrase = phrase.replace("By","")
acro = ""
for word in phrase.upper().split():
acro += word[0]
print(acro)