Buggy python submission (verdict: Runtime Error):
import sys
l=[t for t in sys.stdin]
i=0
while 1:
    pt=[i.find("1") for i in l[9*i:9*(i+1)] if i.find("1")!=-1]
    if not pt:break
    if len(pt)==1:print("C")
    elif len(pt)==2 and pt[0]==pt[1]:print("A")
    elif len(pt)==2 and pt[0]<pt[1]:print("E")
    elif len(pt)==2 and pr[0]>pt[1]:print("G")
    elif len(pt)==3 and pt[0]>pt[1]:print("D")
    elif len(pt)==3 and pt[0]<pt[1]:print("F")
    else: print("B")
    i+=1



Fixed submission:
t=[{(0,1),(1,0),(1,1)},
   {(1,0),(2,0),(3,0)},
   {(0,1),(0,2),(0,3)},
   {(1,-1),(1,0),(2,-1)},
   {(0,1),(1,1),(1,2)},
   {(1,0),(1,1),(2,1)},
   {(0,1),(1,-1),(1,0)}
]

while 1:
    l=[input() for _ in range(8)]
    pos=sorted([(i,j) for i in range(8) for j in range(8) if l[i][j]=="1"])
    cv=lambda v:tuple([v[0]-pos[0][0],v[1]-pos[0][1]])
    pt=set(map(cv,pos))
    [print(chr(65+i)) for (i,j) in enumerate(t) if pt&j==j]
    try:
        input()
    except:
        break

Buggy python submission (verdict: Runtime Error):
import sys
l=[t for t in sys.stdin]
i=0
while 1:
    pt=[i.find("1") for i in l[9*i:9*(i+1)] if i.find("1")!=-1]
    if not pt:break
    if len(pt)==1:print("C")
    elif len(pt)==2 and pt[0]==pt[1]:print("A")
    elif len(pt)==2 and pt[0]<pt[1]:print("E")
    elif len(pt)==2 and pr[0]>pt[1]:print("G")
    elif len(pt)==3 and pt[0]>pt[1]:print("D")
    elif len(pt)==3 and pt[0]<pt[1]:print("F")
    else: print("B")
    i+=1



Fixed submission:
t=[{(0,1),(1,0),(1,1)},
   {(1,0),(2,0),(3,0)},
   {(0,1),(0,2),(0,3)},
   {(1,-1),(1,0),(2,-1)},
   {(0,1),(1,1),(1,2)},
   {(1,0),(1,1),(2,1)},
   {(0,1),(1,-1),(1,0)}
]

while 1:
    l=[input() for _ in range(8)]
    pos=sorted([(i,j) for i in range(8) for j in range(8) if l[i][j]=="1"])
    cv=lambda v:tuple([v[0]-pos[0][0],v[1]-pos[0][1]])
    pt=set(map(cv,pos))
    [print(chr(65+i)) for (i,j) in enumerate(t) if pt&j==j]
    try:
        input()
    except:
        break

Buggy python submission (verdict: Runtime Error):
import sys
l=[t for t in sys.stdin]
i=0
while 1:
    pt=[i.find("1") for i in l[9*i:9*(i+1)] if i.find("1")!=-1]
    if not pt:break
    if len(pt)==1:print("C")
    elif len(pt)==2
        if pt[0]==pt[1]:print("A")
        elif pt[0]<pt[1]:print("E")
        elif pr[0]>pt[1]:print("G")
    elif len(pt)==3
        if pt[0]>pt[1]:print("D")
        elif pt[0]<pt[1]:print("F")
    else: print("B")
    i+=1



Fixed submission:
t=[{(0,1),(1,0),(1,1)},
   {(1,0),(2,0),(3,0)},
   {(0,1),(0,2),(0,3)},
   {(1,-1),(1,0),(2,-1)},
   {(0,1),(1,1),(1,2)},
   {(1,0),(1,1),(2,1)},
   {(0,1),(1,-1),(1,0)}
]

while 1:
    l=[input() for _ in range(8)]
    pos=sorted([(i,j) for i in range(8) for j in range(8) if l[i][j]=="1"])
    cv=lambda v:tuple([v[0]-pos[0][0],v[1]-pos[0][1]])
    pt=set(map(cv,pos))
    [print(chr(65+i)) for (i,j) in enumerate(t) if pt&j==j]
    try:
        input()
    except:
        break

Buggy python submission (verdict: Runtime Error):
import sys
l=[t for t in sys.stdin]
i=0
while 1:
    pt=[i.find("1") for i in l[9*i:9*(i+1)] if i.find("1")!=-1]
    if not pt:break
    if len(pt)==1:print("C")
    elif len(pt)==2:
        if pt[0]==pt[1]:print("A")
        elif pt[0]<pt[1]:print("E")
        elif pr[0]>pt[1]:print("G")
    elif len(pt)==3:
        if pt[0]>pt[1]:print("D")
        elif pt[0]<pt[1]:print("F")
    else: print("B")
    i+=1



Fixed submission:
t=[{(0,1),(1,0),(1,1)},
   {(1,0),(2,0),(3,0)},
   {(0,1),(0,2),(0,3)},
   {(1,-1),(1,0),(2,-1)},
   {(0,1),(1,1),(1,2)},
   {(1,0),(1,1),(2,1)},
   {(0,1),(1,-1),(1,0)}
]

while 1:
    l=[input() for _ in range(8)]
    pos=sorted([(i,j) for i in range(8) for j in range(8) if l[i][j]=="1"])
    cv=lambda v:tuple([v[0]-pos[0][0],v[1]-pos[0][1]])
    pt=set(map(cv,pos))
    [print(chr(65+i)) for (i,j) in enumerate(t) if pt&j==j]
    try:
        input()
    except:
        break