How to display only numbers in a coulmn if it has strings and numbers. if only string is present then the column should left as empty : Please help me to find a Sql query/ procedure for below request.

I am having column A which is having below values in each row

COLUMN A
My toy is in ('111000','1112220')
My toy is this
My toy is in ('111000')
My toy is this 
My toy is in ('111002')

Now i need a query to display the column A with value containing only numbers, If the row is not having any number then it should be left as empty like below

COLUMN A
111000|1112220

111000

111002

if it is a store procedure/ a query any thing is fine for me. Please help me on this