Identify the data structure used in this program.
Program: String matching program
Without further information, it's not possible to definitively identify the data structure used in a string matching program. However, common data structures used in string matching algorithms include arrays, hash tables, and trees (such as a trie or a suffix tree).
Complete the following task based on the instruction and optional input provided.### Instruction:
Identify the data structure used in this program.

### Input:
Program: String matching program

### Output:
Without further information, it's not possible to definitively identify the data structure used in a string matching program. However, common data structures used in string matching algorithms include arrays, hash tables, and trees (such as a trie or a suffix tree).