
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
During the Shanghai World Expo, a store sold 11 different types of souvenirs, 8 of which were priced at 10 yuan each, and 3 of which were priced at 5 yuan each. Xiao Wang spent exactly 50 yuan to buy souvenirs, buying at most one of each type, and the money was exactly used up. Determine the number of different ways to buy the souvenirs.

Present the answer in LaTex format: \boxed{Your answer}
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