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Aryan and his friends are very fond of patterns. For a given integer ‘N’, they want to make the Reverse Letter Triangle.

You must print a matrix corresponding to the given Reverse Letter Triangle.

```
Input: ‘N’ = 3
Output:
A B C
A B
A
```

Detailed explanation

```
1 <= N <= 20
Time Limit: 1 sec
```

```
3
```

```
A B C
A B
A
```

```
4
```

```
A B C D
A B C
A B
A
```

```
7
```

```
A B C D E F G
A B C D E F
A B C D E
A B C D
A B C
A B
A
```