import sys

filename = 'letters.txt'
mode = 'r'  # read mode

# Step 1) Open the file
# Step 2) Verify successful file open 
try:
    inputFileObj = open( filename, mode )

    # Step 3) Read from or write to the file

    # Read all of the lines from the file and put them into a list
    listOfLines = inputFileObj.readlines()
except:
    print('ERROR! Unable to open or read from', filename)
    sys.exit()

# Step 4) Close the file
inputFileObj.close()


# loop through each line
# display each line (which includes the newline)
counter = 1
for line in listOfLines:
    print(f'Line #{counter:02}: {line}', end='')
    counter += 1