<think>
Okay, I need to implement the camel_break function. The goal is to split an identifier into words where each word after the first starts with a capital letter. The function should return these words in lowercase. But if there are consecutive capitals, like in an abbreviation, how do I handle that? The problem statement doesn't specify, so I need to make an assumption here.

Hmm, the example given in the problem says that a capital at the very start doesn't produce an empty first word. So, if the input starts with a capital, that's the first word. But if there are consecutive capitals, like "CamelCase", then the first word is "camel", and the next is "case". Wait, but if there's a sequence of capitals, like "CamelCaseId", then the first word is "camel", then "case", then "id". But if there's a run of capitals, like "CamelCase", how do I split them? The problem says that a run of consecutive capitals should be divided, but the exact method isn't specified. 

Wait, maybe the function should split on transitions from lowercase to uppercase. So, each time there's a lowercase followed by an uppercase, that's a new word. But if there are multiple consecutive uppercase letters, like "CamelCase", then the first word is "camel", and the next is "case". But if there's a sequence like "CamelCase", then the first word is "camel", then "case". But if there's a run of capitals, like "CamelCase", then the first word is "camel", then "case". But how to handle that?

Alternatively, maybe the function should split the string into words whenever there's a capital letter that follows a lowercase letter. So, the idea is to split the string into words where each word starts with a lowercase letter, except the first word which may start with a capital. Wait, but the first word is the first part of the identifier. For example, if the input is "CamelCase", the first word is "Camel", then "Case". But according to the problem statement, the first word should not be empty if there's a capital at the start. So, the first word is the first part, and then each subsequent capital starts a new word.

Wait, the problem says that the first word is the first part, and each subsequent word starts with a capital. So, the function should split the string into words where each word is a sequence of lowercase letters followed by a capital letter. But if there are consecutive capitals, like in "CamelCase", then the first word is "Camel", then "Case". But if there's a run of capitals, like "CamelCase", then the first word is "Camel", then "Case". But how to split that?

Alternatively, maybe the function should split the string into words whenever a capital letter is found after a lowercase letter. So, the first word is the first part, and then each time there's a capital letter, it starts a new word. But if there are consecutive capitals, like in "CamelCase", then the first word is "Camel", then "Case". But if there's a run of capitals, like "CamelCase", then the first word is "Camel", then "Case".

Wait, but the problem says that a run of consecutive capitals should be divided. But the problem doesn't specify how. So, perhaps the function should split on any capital letter that is not part of a consecutive sequence. For example, if there's a sequence of capitals, like "CamelCase", then the first word is "Camel", then "Case". But if there's a