The Red/Yellow Sequence

Write a function that takes a number n and a string s as arguments and returns the nth term of the Red/Yellow sequence. s will ask the function what to return, all, red or yellow.

Examples

rySeq(2, "all") ➞ 5

rySeq(3, "yellow") ➞ 8

rySeq(28, "red") ➞ 55

rySeq(1, "blue") ➞ false

Notes

• If s is not "all", "yellow" or "red", return false.
• If n is 0, return 0.
• n is always a positive integer.