# Powers on new lines

You are given the list of powers of

`2`

which includes all the powers of two that have 1-4 digits.```
1
2
4
8
16
32
64
128
256
512
1024
2048
4096
8192
```

For easier visualization, you’re asked to group the powers of

`2`

by the number of digits.The program should first print

`These are the powers of two:`

after which, the second line should contain all the single-digit powers of two (1, 2, 4, 8). The next line should contain powers that have double-digits. Then comes a line with 3 digits and finally all the 4-digit numbers.The numbers on each line should be separated by a space and a comma. Each line of numbers should start with an opening bracket

`(`

and end with a closing one `)`

:```
(1, 2, 4, 8)
(16, 32, 64)
...
```

#### Constraints

Time limit: 2 seconds

Memory limit: 512 MB

Output limit: 1 MB