Re-arrange the words to form a complete sentence with a correct grammar.
is government people their power a source in greatest the
The greatest source of power in their government is the people.
Complete the following task based on the instruction and optional input provided.### Instruction:
Re-arrange the words to form a complete sentence with a correct grammar.

### Input:
is government people their power a source in greatest the

### Output:
The greatest source of power in their government is the people.