CF58E.Expression

One day Vasya was solving arithmetical problems. He wrote down an expression a + b = c in his notebook. When the teacher checked Vasya's work it turned out that Vasya had solved the problem incorrectly. Now Vasya tries to find excuses. He says that he simply forgot to write down several digits in numbers a, b and c, but he can't remember what numbers they actually were. Help Vasya, find such numbers x, y and z, with which the following conditions are met:

• x + y = z,
• from the expression x + y = z several digits can be erased in such a way that the result will be a + b = c,
• the expression x + y = z should have the minimal length.

一天，瓦西娅正在解算术题。他在笔记本上写下了表达式 $a + b = c$。当老师检查瓦西娅的作业时，发现他解错了。现在瓦西娅正试图找借口，声称自己只是在数字 $a$、$b$ 和 $c$ 中遗漏书写了若干位数字，但他已记不清这些数字原本是什么了。请帮助瓦西娅找出满足以下条件的数字 $x$、$y$ 和 $z$：

• $x + y = z$；
• 从表达式 $x + y = z$ 中删去若干位数字（可删去任意位置的若干数字，但不能改变剩余数字的相对顺序），可以得到 $a + b = c$；
• 表达式 $x + y = z$ 的总长度（即 $x$、$y$、$z$ 的十进制表示拼接后不含加号与等号的总字符数）应尽可能小。

The first and only input line contains the expression a + b = c (1 ≤ a, b, c ≤ 106, a, b and c don't contain leading zeroes) which is the expression Vasya wrote down.

第一行且唯一一行输入包含表达式 $a + b = c$（其中 $1 \le a, b, c \le 10^6$，且 $a$、$b$、$c$ 均不包含前导零），该表达式是瓦夏写下的。

Print the correct expression x + y = z (x, y and z are non-negative numbers without leading zeroes). The expression a + b = c must be met in x + y = z as a subsequence. The printed solution should have the minimal possible number of characters. If there are several such solutions, you can print any of them.

输出正确的表达式 $x + y = z$（其中 $x$、$y$ 和 $z$ 是无前导零的非负整数）。该表达式 $a + b = c$ 必须作为子序列出现在 $x + y = z$ 中。所输出的解应具有最少的字符数。若存在多个满足条件的解，输出任意一个即可。