def check_connection(network, first, second):
    visited = []
    if graph(visited, network, first, second) == True:
        return True
    return False


def graph(visited, network, first, second):
    for elem in network:
        if first in elem:
            if first in elem and elem not in visited:
                visited.append(elem)
                first = [x for x in elem.split('-') if x != first][0]
                if first == second:
                    return True
                return graph(visited, network, first, second)






if __name__ == '__main__':
    #These "asserts" using only for self-checking and not necessary for auto-testing
    assert check_connection(
        ("dr101-mr99", "mr99-out00", "dr101-out00", "scout1-scout2",
         "scout3-scout1", "scout1-scout4", "scout4-sscout", "sscout-super"),
        "scout2", "scout3") == True, "Scout Brotherhood"
    assert check_connection(
        ("dr101-mr99", "mr99-out00", "dr101-out00", "scout1-scout2",
         "scout3-scout1", "scout1-scout4", "scout4-sscout", "sscout-super"),
        "super", "scout2") == True, "Super Scout"
    assert check_connection(
        ("dr101-mr99", "mr99-out00", "dr101-out00", "scout1-scout2",
         "scout3-scout1", "scout1-scout4", "scout4-sscout", "sscout-super"),
        "dr101", "sscout") == False, "I don't know any scouts."