output_description: Print the answer.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      s_1 s_2 s_3
attempt: a, b, c = input().split()
  dic = {
      "a": "A",
      "b": "B",
      "c": "C",
      "d": "D",
      "e": "E",
      "f": "F",
      "g": "G",
      "h": "H",
      "i": "I",
      "j": "J",
      "k": "K",
      "l": "L",
      "m": "M",
      "n": "N",
      "o": "O",
      "p": "P",
      "q": "Q",
      "r": "R",
      "s": "S",
      "t": "T",
      "u": "U",
      "v": "V",
      "w": "W",
      "x": "X",
      "y": "Y",
      "z": "Z",
  }
  print(dic[a[0]] + dic[b[0]] + dic[c[0]])
  
problem_description: Statement
  
  You are given three words s_1, s_2 and s_3, each composed of lowercase English
  letters, with spaces in between. Print the acronym formed from the uppercased
  initial letters of the words.
samples: [{"input": "atcoder beginner contest", "output": "ABC\n    \n\nThe initial letters of `atcoder`, `beginner` and `contest` are `a`, `b` and\n`c`. Uppercase and concatenate them to obtain `ABC`.\n\n* * *"}, {"input": "resident register number", "output": "RRN\n    \n\n* * *"}, {"input": "k nearest neighbor", "output": "KNN\n    \n\n* * *"}, {"input": "async layered coding", "output": "ALC"}]