def prg():
global line_number
line_number = get_line_number()
token = peek_token()
if token == 'program':
match('program')
token = tokens[0]
match('id')
green_node = GreenNode(token[1], 'pname')
green_node.previous_node = "root"
nodes.insert(0, green_node)
# print nodes
match('(')
idlist()
match(')')
match(';')
prg_()
else:
del synch_set[:]
synch_set.append('$')
handle_sync()
syntax_error(token, 'program')
