File Handling 3 input files and 1 output file by using EZT

[pavan426]

i have 3 input files
file-1(UNIQUE ACCOUNT NUMBER)
in1-acct-number 1 7 P

FILE-2 (DUPLICATE ACCOUNT NUMBER HAVING MORE THAN 1)
IN2-ACCT-NUMBER 1 13 A
IN2-NAME 14 20 A

FILE-3(DUPLICATE ACCOUNT NUMBER HAVING MORE THAN 1)
IN3-ACCT-NUMBER 1 12 N
1n3-AMOUNT 13 5 P

file-4(output)
out-acct 1 12 n
out-name 13 20 a
out-amount 33 5 p

i need to get all the records from the from the input file based on the account-number into output files by using easytrieve, can any one help me how to write this logic by using easytrieve