Where can I find a program for building combinations?

Question

Software and Internet Services

Hello. Need a program to build combinations of the entered information. For example.
Input1
t1 t2 t3 Input2 r1 r2 r3 Output t1r1 t1r2 t1r3 t2r1
t2r2
... I
understand
that
the question
is strange . Such a program is written in minutes. But have you seen anything similar?

Answer 1

Two for loops

Answer 2

It is possible in Excel , for example