# -*- coding: utf-8 -*-

import os, sys
import sysv_ipc


str1 = "abcde"
str2 = "wedhsjkmas"

# q = sysv_ipc.MessageQueue(sysv_ipc.IPC_PRIVATE, sysv_ipc.IPC_EXCL| sysv_ipc.IPC_CREAT)
r, w = os.pipe()
p = os.fork()

if p == 0: # in child
    out = ""
    # serching text from str2 which are exists in str1
    for i in str2:
        for j in str1:
            if i == j:
                out += i
                break
    os.close(r)
    os.write(w, out)
    sys.exit(0)
    # q.send(out)


else:
    os.close(w)
    str = os.read(r, 4096)
    print str


    # print q.receive()[0]