Find all strings recognized by this deterministic finite-state automaton. 
Definitions:
Leverage Ratio
A financial ratio indicating the level of debt used by a business to finance its assets and operations.
Interest Burden
The impact of interest expenses on a company's earnings, often expressed as a ratio or percentage of earnings before interest and taxes.
Return-On-Sales Ratio
A profitability metric that calculates the efficiency of a company in converting sales into profits, indicating how much of each dollar of sales is translated into profit.
ROE
Return on Equity, a measure of financial performance calculated by dividing net income by shareholders' equity, indicating how effectively management is using a company’s assets to create profits.
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