Write a program that queries information from three files. The first file (data1. txt) contains the names and telephone numbers of a group of people. The second file (data2. txt) contains the names and Social Security numbers of a group of people. The third file (data3. txt) contains the Social Security numbers and annual incomes of a group of people. The groups of people should overlap but need not be completely identical. Your program should ask the use for a telephone number and then print the name, Social Security number, and annual income, if it can determine that information.

file1=[ ]

file2=[ ]

file3=[ ]

f1=open ('data1. txt','r')

for line in f1:

line=line. strip (). split (', ')

file1. append ((line[0], line[1]))

f1. close ()

f2=open ('data2. txt','r')

for line in f2:

line=line. strip (). split (', ')

file2. append ((line[0], line[1]))

f2. close ()

f3=open ('data3. txt','r')

for line in f3:

line=line. strip (). split (', ')

file3. append ((line[0], line[1]))

f3. close ()

l=[ ]

for x in file2:

for y in file3:

if x[1] in y:

l. append ((x[0], y))

final_file=[]

for x in file1:

for y in l:

if x[0] in y:

final_file. append ((x[1], y[0],*y[1]))

#This is where the program will ask the user for their telephone number

tel_num=input ('Enter the telephone number: ')

temp=0

for data in final_file:

if data[0]==tel_num:

temp=1

print ('Telephone number: ', tel_num)

print ('Name: ', data[1])

print ('Social Security number: ', data[2])

print ('Annual income: ', data[3])

if temp==0:

print ('No data available for this telephone number.')