We cannot provide a thorough and accurate answer (short of getting lucky in guessing) without knowing more about your data set. Why don't you post the contents of, say, five of the elements in @arr, rather than partially describing the field names.

Be sure to wrap this sample data in code tags so that we can see if there are useful patterns such as fixed-width field sizes.

Also explain how a person looking at the data should differentiate between the fields; are they separated by white space? Are they separated by commas? Are delimiters allowed within the fields too? If so, how does escaping work? Does this data format have a name that we might recognize, or was it produced by a commonly known source (which saves you a little work in describing it)?

We don't know what you're working with unless you tell us, and if we don't know what you're working with, we don't know how to show you to work with it.