一个表达式x（）y==z的值为真，其中x，y，z都是整数。括号内可能出现的运算符包括：+、-、*、/、 ，请根据输入的x，y，z的值，输出括号内应填写的运算符（数据保证只有一个运算符满足条件）。

样例输入：292 123 415

样例输出：+

-An expression x () the value of y==z is true, where x, y, Z are all integers. Operators that may appear in brackets include:+,-,*, /, , depending on the value of the input y, x, Z, the output brackets should be filled in the operator (data to ensure that only one operator to meet the conditions).