Simply Square Again

Time Limit: 1 sec

**The Problem**

**Squaring** is the simplest thing of math. It’s a simple **multiplication**. A number, **a** and some **instructions** will be given and you have to solve the problem by following those **instructions**.

**Step 1**: Squaring the given number such as:

If a = 32

**32 ^{2} **

= 1024

**Step 2**: Add all the digits of the answer

**1 + 0 + 2 + 4 **

= 7

**Step 3**: Square the answer

**7 ^{2}^{ }**

= 49

**Step 4**: Subtract step 3’s answer from step 1

**1024 – 49**

= 975

**Step 5**: Square the answer

**975 ^{2}**

= 950625

**Step 6**: Print the value of 1’s digit

**5**

**The Input**

Input file contains a series of line. Each line contains a single integer **a (32<=a<=99).** Input is terminated by EOF

**The Output**

For each line of input output will show the 1’s digit of the answer in a separate line.

**Sample Input**

32

40

50

60

65

70

99

**Sample Output**

5

1

1

1

6

1

9

Problem Setter: Samia Safa Ahmed