Typing a gives sa and typing s gives sa

Hello,

Hope you will be fine. I am having a problem with my keyboard while typing, on pressing
a gives as
s gives sa
q gives qw
w gives wq
1 gives 12
2 gives 21
z gives zx
x gives xz

whereas rest of the keys are working perfectly.

Please suggest how to resolve this issue or should i go for replacing the keyboard?

Thanks. :D