The new operating system BerOS has a nice feature. It is possible to use any number of characters '' as a delimiter in path instead of one traditional ''. For example, strings usrlocalnginxsbin and usrlocalnginxsbin are equivalent. The character '' (or some sequence of such characters) at the end of the path is required only in case of the path to the root directory, which can be represented as single character ''. A path called normalized if it contains the smallest possible number of characters ''. Your task is to transform a given path to the normalized form.

输入描述:

The first line of the input contains only lowercase Latin letters and character '' — the path to some directory. All paths start with at least one character ''. The length of the given line is no more than 100 characters, it is not empty.

输出描述:

The path in normalized form.