
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

Karlson opened a school, and on September 1st in all three first grades there were three lessons: "Kurashenie," "Nizvedenie," and "Durakavalyanie." The same subject cannot be taught simultaneously in two classes. "Kurashenie" was the first lesson in class 1B. The "Durakavalyanie" teacher praised the students of 1B: "You are doing even better than 1A." "Nizvedenie" was the second lesson not in class 1A. In which class was "Durakavalyanie" taught in the last lesson?

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