Return the Index of All Capital Letters

Create a function that takes a single string as argument and returns an ordered list containing the indices of all capital letters in the string.

Examples

index_of_caps("sAmPlE") ➞ [1, 3, 5]

index_of_caps("eQuINoX") ➞ [1, 3, 4, 6]

index_of_caps("determine") ➞ []

index_of_caps("STRIKE") ➞ [0, 1, 2, 3, 4, 5]

index_of_caps("sUn") ➞ [1]

Notes

• Return an empty list if no uppercase letters are found in the string.
• Special characters ($#@%) and numbers will be included in some test cases.
• Assume all words do not have duplicate letters.