Buggy python submission (verdict: Runtime Error):
#coding: utf-8

import sys

def keitai(n1,n2):
    li1 = ['.', ',', '!', '?'] 
    li2 = ['a','b','c']
    li3 = ['d','e','f']
    li4 = ['g','h','i']
    li5 = ['j','k','l']
    li6 = ['m','n','o']
    li7 = ['p','q','r','s']
    li8 = ['t','u','v']
    li9 = ['w','x','y','z']
    li = [li1,li2,li3,li4,li5,li6,li7,li8,li9]
    lis = li[n1 - 1]
    n2 = n2 % len(li)
    a = lis[n2 - 1]
    return a

for line in sys.stdin:
    a = str(line)
    num = 0
    for i in len(a):
        if int(a[i]) == 0:
            print keitai(b,num),
        else:
            num = num + 1
            b = int(a[i])
    print ''

Fixed submission:
#coding: utf-8
 
n = int(raw_input())
 
def keitai(n1,n2):
    li1 = ['.', ',', '!', '?',' '] 
    li2 = ['a','b','c']
    li3 = ['d','e','f']
    li4 = ['g','h','i']
    li5 = ['j','k','l']
    li6 = ['m','n','o']
    li7 = ['p','q','r','s']
    li8 = ['t','u','v']
    li9 = ['w','x','y','z']
    li = [li1,li2,li3,li4,li5,li6,li7,li8,li9]
    lis = li[n1 - 1]
    n2 = n2 % len(lis)
    a = lis[n2 - 1]
    return a
 
for k in range(n):
    a = str(raw_input())
    num = 0
    string = ''
    for i in range(len(a)):
        if int(a[i]) == 0:
            if num != 0:
                string = string + keitai(b,num)
                num = 0
            else:
                pass
        else:
            num = num + 1
            b = int(a[i])
    print string

Buggy python submission (verdict: Runtime Error):
#coding: utf-8

import sys

def keitai(n1,n2):
    li1 = ['.', ',', '!', '?'] 
    li2 = ['a','b','c']
    li3 = ['d','e','f']
    li4 = ['g','h','i']
    li5 = ['j','k','l']
    li6 = ['m','n','o']
    li7 = ['p','q','r','s']
    li8 = ['t','u','v']
    li9 = ['w','x','y','z']
    li = [li1,li2,li3,li4,li5,li6,li7,li8,li9]
    lis = li[n1 - 1]
    n2 = n2 % len(li)
    a = lis[n2 - 1]
    return a

for line in sys.stdin:
    a = str(line)
    num = 0
    for i in len(a):
        if int(a[i]) == 0:
            if i = len(a) - 1:
                print keitai(b,num)
            else:
                print keitai(b,num),
        else:
            num = num + 1
            b = int(a[i])

Fixed submission:
#coding: utf-8
 
n = int(raw_input())
 
def keitai(n1,n2):
    li1 = ['.', ',', '!', '?',' '] 
    li2 = ['a','b','c']
    li3 = ['d','e','f']
    li4 = ['g','h','i']
    li5 = ['j','k','l']
    li6 = ['m','n','o']
    li7 = ['p','q','r','s']
    li8 = ['t','u','v']
    li9 = ['w','x','y','z']
    li = [li1,li2,li3,li4,li5,li6,li7,li8,li9]
    lis = li[n1 - 1]
    n2 = n2 % len(lis)
    a = lis[n2 - 1]
    return a
 
for k in range(n):
    a = str(raw_input())
    num = 0
    string = ''
    for i in range(len(a)):
        if int(a[i]) == 0:
            if num != 0:
                string = string + keitai(b,num)
                num = 0
            else:
                pass
        else:
            num = num + 1
            b = int(a[i])
    print string

Buggy python submission (verdict: Runtime Error):
#coding: utf-8

import sys

def keitai(n1,n2):
    li1 = ['.', ',', '!', '?',' '] 
    li2 = ['a','b','c']
    li3 = ['d','e','f']
    li4 = ['g','h','i']
    li5 = ['j','k','l']
    li6 = ['m','n','o']
    li7 = ['p','q','r','s']
    li8 = ['t','u','v']
    li9 = ['w','x','y','z']
    li = [li1,li2,li3,li4,li5,li6,li7,li8,li9]
    lis = li[n1 - 1]
    n2 = n2 % len(lis)
    a = lis[n2 - 1]
    return a

for line in sys.stdin:
    a = str(line)
    num = 0
    string = ''
    for i in range(len(a)):
        if int(a[i]) == 0:
            string = string + keitai(b,num)
            num = 0
        else:
            num = num + 1
            b = int(a[i])
    print string

Fixed submission:
#coding: utf-8
 
n = int(raw_input())
 
def keitai(n1,n2):
    li1 = ['.', ',', '!', '?',' '] 
    li2 = ['a','b','c']
    li3 = ['d','e','f']
    li4 = ['g','h','i']
    li5 = ['j','k','l']
    li6 = ['m','n','o']
    li7 = ['p','q','r','s']
    li8 = ['t','u','v']
    li9 = ['w','x','y','z']
    li = [li1,li2,li3,li4,li5,li6,li7,li8,li9]
    lis = li[n1 - 1]
    n2 = n2 % len(lis)
    a = lis[n2 - 1]
    return a
 
for k in range(n):
    a = str(raw_input())
    num = 0
    string = ''
    for i in range(len(a)):
        if int(a[i]) == 0:
            if num != 0:
                string = string + keitai(b,num)
                num = 0
            else:
                pass
        else:
            num = num + 1
            b = int(a[i])
    print string

Buggy python submission (verdict: Runtime Error):
#coding: utf-8

n = raw_input()

def keitai(n1,n2):
    li1 = ['.', ',', '!', '?',' '] 
    li2 = ['a','b','c']
    li3 = ['d','e','f']
    li4 = ['g','h','i']
    li5 = ['j','k','l']
    li6 = ['m','n','o']
    li7 = ['p','q','r','s']
    li8 = ['t','u','v']
    li9 = ['w','x','y','z']
    li = [li1,li2,li3,li4,li5,li6,li7,li8,li9]
    lis = li[n1 - 1]
    n2 = n2 % len(lis)
    a = lis[n2 - 1]
    return a

for k in range(n):
    a = str(raw_input())
    num = 0
    string = ''
    for i in range(len(a)):
        if int(a[i]) == 0:
            string = string + keitai(b,num)
            num = 0
        else:
            num = num + 1
            b = int(a[i])
    print string

Fixed submission:
#coding: utf-8
 
n = int(raw_input())
 
def keitai(n1,n2):
    li1 = ['.', ',', '!', '?',' '] 
    li2 = ['a','b','c']
    li3 = ['d','e','f']
    li4 = ['g','h','i']
    li5 = ['j','k','l']
    li6 = ['m','n','o']
    li7 = ['p','q','r','s']
    li8 = ['t','u','v']
    li9 = ['w','x','y','z']
    li = [li1,li2,li3,li4,li5,li6,li7,li8,li9]
    lis = li[n1 - 1]
    n2 = n2 % len(lis)
    a = lis[n2 - 1]
    return a
 
for k in range(n):
    a = str(raw_input())
    num = 0
    string = ''
    for i in range(len(a)):
        if int(a[i]) == 0:
            if num != 0:
                string = string + keitai(b,num)
                num = 0
            else:
                pass
        else:
            num = num + 1
            b = int(a[i])
    print string