Your task is to read an input file containing a month name followed by the average maximum temperature for that month in Celsius, and then write an output file with the month names and the average maximum temperature for the month in Fahrenheit. For example, if the input file contains the line "Jan 8.9" on one line, the output file should contain "Jan 40.9" on one line.

The formula for converting from Celsius to Fahrenheit is F = 9/5 C + 32.