Good Poem

Good Poem Thakur finally decided to tell a poem to his girlfriend on phone to impress her. But being a geeky coder, he thinks a good poem is one that only has a number containing digits 1 or 2 only. So only numbers like 112, 12222 forms a good poem and not 1134, 8222 etc. Now Thakur's girlfriend is also very meticulous about the poem. She has given some demands on the number Thakur is going to r