<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def add_f03_to_env(env):
 """Add Builders and construction variables for f03 to an Environment."""

    try:
        F03Suffixes = env['F03FILESUFFIXES']
    except KeyError:
        F03Suffixes = ['.f03']

    #print("Adding %s to f95 suffixes" % F95Suffixes)
    try:
        F03PPSuffixes = env['F03PPFILESUFFIXES']
    except KeyError:
        F03PPSuffixes = []

    DialectAddToEnv(env, "F03", F03Suffixes, F03PPSuffixes,
                    support_module = 1)