Implement dot product of two vectors

Given two lists of numbers (vectors), compute their dot product.

The dot product of vectors a and b is: sum(a[i] * b[i]) for all i.

Input: Two lines. First line: space-separated numbers for vector a. Second line: space-separated numbers for vector b.

Output: A single number (the dot product).

Example:

• Input: 1 2 3 and 4 5 6
• Output: 32 (14 + 25 + 3*6 = 4+10+18 = 32)