Sum of even Fibbonacci

Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 1, the first 10 terms will be:

1,1, 2, 3, 5, 8, 13, 21, 34, 55 .....

By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.


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