I have a table like below, it is a bed file of genome coordinate, I would like to keep only rows with numbers.

Input:

    1	        141009669	141009952
    9	        141016322	141016973
    GL000195.1	81719	82468
    GL000195.1	142613	142923
    GL000220.1	119445	119746
    HG115_PATCH 101957832	101958132
    HG1308_PATCH 130205069	130205369
    HG1308_PATCH 130205406	130205773
    HG748_PATCH  77577953	77578264
    X	         200983	202660
    y         205180	205702


output:

    1	        141009669	141009952
    9	        141016322	141016973
    X	         200983	202660
    y	         205180	205702


Thanks in advance!
you can do the opposite

    awk '{print $1}' file | sort | uniq 

to find the rows you want to exclude and then exclude them with grep

    grep -v -e 'pattern1' -e 'pattern2'