# start_1





Start with 2 int lists, a and b, of any length. Return how many of the lists have 1 as their first element.

This exercise was taken from [codingbat.com](https://codingbat.com/prob/p109660) 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:**
```
[1, 2, 3]
[1, 3]
```
**Output:**
```
2
```
### Test 2
**Input:**
```
[7, 2, 3]
[1]
```
**Output:**
```
1
```
### Test 3
**Input:**
```
[1, 2]
[]
```
**Output:**
```
1
```
### Test 4
**Input:**
```
[]
[1, 2]
```
**Output:**
```
1
```
### Test 5
**Input:**
```
[7]
[]
```
**Output:**
```
0
```
### Test 6
**Input:**
```
[7]
[1]
```
**Output:**
```
1
```
### Test 7
**Input:**
```
[1]
[1]
```
**Output:**
```
2
```
### Test 8
**Input:**
```
[7]
[8]
```
**Output:**
```
0
```
### Test 9
**Input:**
```
[]
[]
```
**Output:**
```
0
```
### Test 10
**Input:**
```
[1, 3]
[1]
```
**Output:**
```
2
```