The given data frame 'customer' has a column 'Cust_id' which has values Cust_1, Cust_2 and so on. Remove the repeated 'Cust_' from the column Cust_id so that the output column Cust_id have just numbers like 1, 2, 3 and so on.
e.g. Column Heading is "Customer Info"
CUSTOMET INFO
Cust_1 Cust_2 Cust_3 * * * * Cust_100
Desired Output is:
CUSTOMET INFO
1 2 3 4 * * * * 100