from sys import argv, exit

class DefaultDict(dict):
    def __init__(self,default):
        super(DefaultDict, self).__init__()
        self.default = default

    def __getitem__(self, key):
        return self.get(key, self.default)

if len(argv) <= 2:
    print("%s <format_left> <format_right>" % argv[0])
    exit(1)

format_left = argv[1]
format_right = argv[2]
cache = DefaultDict("")

_format = lambda: '%{l}' + (format_left % cache) + '%{r}' + (format_right % cache)

while True:
    print(_format())
    tag,content = input().rstrip('\n').split(' ',1)
    cache[tag] = content