Buggy python submission (verdict: Runtime Error):

def main():
  S_=input()
  T=input()
  U=[]
  if len(S_)<len(T):
    print('UNRESTORABLE')
    return
  for i in range(len(S_)-len(T)+1):
    flag=True
    for j in range(len(T)):
      if S_[i+j]!='?' and S_[i+j]!=T[j]:
        flag=False
        break
    if flag:
      S=['a']*len(S_)
      for k in range(i):
        if S_[k]!='?':
          S[k]=S_[k]
      for k in range(i,i+len(T)):
        S[k]=T[k-i]
      for k in range(i+len(T),len(S_)):
        if S_[k]!='?':
          S[k]=S_[k]
      if ans=='':
        ans=''.join(S)
      elif ans>''.join(S):
        ans=''.join(S)
  if ans=='':
    print('UNRESTORABLE')
  else:
    print(ans)
  return

main()


Fixed submission:

def main():
  S_=input()
  T=input()
  ans=''
  if len(S_)<len(T):
    print('UNRESTORABLE')
    return
  for i in range(len(S_)-len(T)+1):
    flag=True
    for j in range(len(T)):
      if S_[i+j]!='?' and S_[i+j]!=T[j]:
        flag=False
        break
    if flag:
      S=['a']*len(S_)
      for k in range(i):
        if S_[k]!='?':
          S[k]=S_[k]
      for k in range(i,i+len(T)):
        S[k]=T[k-i]
      for k in range(i+len(T),len(S_)):
        if S_[k]!='?':
          S[k]=S_[k]
      if ans=='':
        ans=''.join(S)
      elif ans>''.join(S):
        ans=''.join(S)
  if ans=='':
    print('UNRESTORABLE')
  else:
    print(ans)
  return

main()

Buggy python submission (verdict: Runtime Error):

def main():
  S_=input()
  T=input()
  U=[]
  if len(S_)<len(T):
    print('UNRESTORABLE')
    return
  for i in range(len(S_)-len(T)+1):
    flag=True
    for j in range(len(T)):
      if S_[i+j]!='?' and S_[i+j]!=T[j]:
        flag=False
        break
    if flag:
      S=['a']*len(S_)
      for k in range(i):
        if S_[k]!='?':
          S[k]=S_[k]
      for k in range(i,i+len(T)):
        S[k]=T[k-i]
      for k in range(i+len(T),len(S_)):
        if S_[k]!='?':
          S[k]=S_[k]
      if ans=='':
        ans=''.join(S)
      elif ans>''.join(S):
        ans=''.join(S)
  if ans=='':
    print('UNRESTORABLE')
  else:
    print(ans)
  return

main()


Fixed submission:

def main():
  S_=input()
  T=input()
  ans=''
  if len(S_)<len(T):
    print('UNRESTORABLE')
    return
  for i in range(len(S_)-len(T)+1):
    flag=True
    for j in range(len(T)):
      if S_[i+j]!='?' and S_[i+j]!=T[j]:
        flag=False
        break
    if flag:
      S=['a']*len(S_)
      for k in range(i):
        if S_[k]!='?':
          S[k]=S_[k]
      for k in range(i,i+len(T)):
        S[k]=T[k-i]
      for k in range(i+len(T),len(S_)):
        if S_[k]!='?':
          S[k]=S_[k]
      if ans=='':
        ans=''.join(S)
      elif ans>''.join(S):
        ans=''.join(S)
  if ans=='':
    print('UNRESTORABLE')
  else:
    print(ans)
  return

main()

Buggy python submission (verdict: Runtime Error):

def main():
  S_=input()
  T=input()
  U=[]
  if len(S_)<len(T):
    print('UNRESTORABLE')
    return
  for i in range(len(S_)-len(T)+1):
    flag=True
    for j in range(len(T)):
      if S_[i+j]!='?' and S_[i+j]!=T[j]:
        flag=False
        break
    if flag:
      S=['a']*len(S_)
      for k in range(i):
        if S_[k]!='?':
          S[k]=S_[k]
      for k in range(i,i+len(T)):
        S[k]=T[k-i]
      for k in range(i+len(T),len(S_)):
        if S[k]_!='?':
          S[k]=S_[k]
      if ans=='':
        ans=''.join(S)
      elif ans>''.join(S):
        ans=''.join(S)
  if ans=='':
    print('UNRESTORABLE')
  else:
    print(ans)
  return

main()


Fixed submission:

def main():
  S_=input()
  T=input()
  ans=''
  if len(S_)<len(T):
    print('UNRESTORABLE')
    return
  for i in range(len(S_)-len(T)+1):
    flag=True
    for j in range(len(T)):
      if S_[i+j]!='?' and S_[i+j]!=T[j]:
        flag=False
        break
    if flag:
      S=['a']*len(S_)
      for k in range(i):
        if S_[k]!='?':
          S[k]=S_[k]
      for k in range(i,i+len(T)):
        S[k]=T[k-i]
      for k in range(i+len(T),len(S_)):
        if S_[k]!='?':
          S[k]=S_[k]
      if ans=='':
        ans=''.join(S)
      elif ans>''.join(S):
        ans=''.join(S)
  if ans=='':
    print('UNRESTORABLE')
  else:
    print(ans)
  return

main()