Extract character strings from a vector

Hello,



I have a vector x of character strings:



x <- c("LM0122","RTGFFFF", "GF TYHH", "HJN 89963", "KFTR1","RT 8")

From this vector, how can I extract the following character strings (i.e., which contain 0 or 1 numeric value)

[1] "RTGFFFF"   "GF TYHH"   "KFTR1"  "RT 8"



Thank you very much for your help.

Have a nice day

Marine