def main():
    # Prompt the user to enter a file
    filename = input("Enter a filename: ").strip()
    infile = open(filename, "r")  # Open the file

    wordCounts = {}  # Create an empty dictionary to count words
    for line in infile:
        processLine(line.lower(), wordCounts)
     
    pairs = list(wordCounts.items())  # Get pairs from the dictionary

    items = [[y, x] for (x, y) in pairs]  # Reverse pairs in the list

    items.sort()  # Sort pairs in items

    for i in range(len(items) - 1, len(items) - 11, -1):
        print(items[i][1] + "\t" + str(items[i][0]))
  
# Count each word in the line
def processLine(line, wordCounts): 
    line = replacePunctuations(line)  # Replace punctuations with space
    words = line.split()  # Get words from each line
    for word in words:
        if word in wordCounts:
            wordCounts[word] += 1
        else:
            wordCounts[word] = 1

# Replace punctuations in the line with space
def replacePunctuations(line):
    for ch in line:
        if ch in "~@#$%^&*()_-+=~<>?/,.;:!{}[]|'\"":
            line = line.replace(ch, " ")

    return line

main()  # Call the main function