# cat_dog



**Requirements:**
```eval_rst
- :ref:`fundamentals:substrings and slicing`
- :ref:`fundamentals:if, elif, else`
- :ref:`fundamentals:loop through a string (while)`
- :ref:`fundamentals:loop with an accumulator variable`

```


Output `True` if the substrings `"cat"` and `"dog"` appear the same number of times in a string input by the user. Otherwise, output `False`.

This exercise was taken from [codingbat.com](https://codingbat.com/prob/p111624) and has been adapted for the Python language. There are many great programming exercises there, but the majority are created for Java.






### Test 1
**Input:**
```
'catdog'
```
**Output:**
```
True
```
### Test 2
**Input:**
```
'catcat'
```
**Output:**
```
False
```
### Test 3
**Input:**
```
'1cat1cadodog'
```
**Output:**
```
True
```
### Test 4
**Input:**
```
'catxxdogxxxdog'
```
**Output:**
```
False
```
### Test 5
**Input:**
```
'catxdogxdogxcat'
```
**Output:**
```
True
```
### Test 6
**Input:**
```
'catxdogxdogxca'
```
**Output:**
```
False
```
### Test 7
**Input:**
```
'dogdogcat'
```
**Output:**
```
False
```
### Test 8
**Input:**
```
'dogogcat'
```
**Output:**
```
True
```
### Test 9
**Input:**
```
'dog'
```
**Output:**
```
False
```
### Test 10
**Input:**
```
'cat'
```
**Output:**
```
False
```
### Test 11
**Input:**
```
'ca'
```
**Output:**
```
True
```
### Test 12
**Input:**
```
'c'
```
**Output:**
```
True
```
### Test 13
**Input:**
```
''
```
**Output:**
```
True
```