Revert "added first regex to test for the word solid in the first line of the file."

This reverts commit 705e6d7577796decb7a494c0c56e8ca5c0353c87.
Revert "Revert "added first regex to test for the word solid in the first line of the file.""

This reverts commit f728bd22396d88bcdf90e0c897de22ff39594470.