Input: text E7X7M P7L E 7STRING A7 B7 CD7 EF7G X7Y O7PQ H7TRW text EXAM PL E 7STRING text EXAMPLE4STR5ING text 7EXAMPLE4STR5ING text
matched: M P7L E
matched: STRING A7 B
matched: CD7 EF
matched: G X7Y O
matched: PQ H7TRW
matched: EXAM PL E 7STRING
matched: EXAMPLE4STR
matched: EXAMPLE4STR