This is the 7490th most frequent Russian word.
денисман
The word "денисман" does not exist in standard Russian; it might be a typo or misinterpretation.
Here, 'Denisman' is used as a proper noun to address the individual in the narrative.
Денисман часто помогает своим друзьям решать сложные задачи.
Denisman often helps his friends solve difficult tasks.
In this sentence, 'Denisman' is declined to the dative case ('Денисману') to correctly fit the grammatical structure.
Я позвонил Денисману, чтобы попросить совета.
I called Denisman to ask for advice.
In this case, 'Denisman' is modified to the accusative case ('Денисмана') as it functions as the direct object of the verb 'видела' (saw).