# coding: utf-8


def main():
    print(mirrored(input()))


def mirrored(l):
    def _mirrored(o, m):
        if not o:
            return m
        else:
            return _mirrored(o[:-2], m + '>' if o[-1] == '<' else '<')
    return _mirrored(l, '')


if __name__ == '__main__':
    main()