replace continous numbers with space

hi...

an urgent requirement...

i have an internal table, with rows containing characters of 70 length.

if i find continous 16 digits of numbers, i have to replace the numbers with space.

How am i supposed to do this?

The first row can be continued by next row record also.

So, how to check the contnuinty in the next record also.

for example...

Line 1--- thrirj1234

line 2 --- 45678thyeu

so, it has c first line and next line to is to be checked to c if it is starting wth numbers.

please do help me solve this issue..

Thank u