英和和英

a knotty problem

a problem

a baffling problem

a trivial problem

a trivial problem

a labyrinthian problem

a shogi problem

a vexing problem

a sticky problem

an ethical problem

a technical problem

a complex problem

a stiff problem

a grave problem

perennial problems

the rootedness of the problem

a simple problem

unknown problem

an issue that becomes a problem

peripheral issues

a problem that occurred once

the root of the problem

the core of the problem

the core of the problem

a worrying problem

squaring the circle

a problem play

a problem play

the problems involved

a problem with the automat