Go: package main

import (
	"bufio"
	"os"
	"strings"
	"strconv"
	"reflect"
	"fmt"
)

var scanner = bufio.NewScanner(os.Stdin)

func scanBoard() [][]int {
	ret := make([][]int, 8)
	for k := range ret {
		ret[k] = make([]int, 8)
		for l := range ret[k] {
			ret[k][l] = 0
		}
	}
	for i := 0; i < 8; i++ {
		scanner.Scan()
		row := strings.Split(scanner.Text(), "")
		for j := 0; j < 8; j++ {
			ret[i][j], _ = strconv.Atoi(row[j])
		}
	}
	return ret
}

func main() {
	for {
		var board [][]int
		var ans string
		if board = scanBoard(); reflect.DeepEqual(board, [][]int{}) {
			break
		}
		fmt.Println(board)
		for i := 0; i < 7; i++ {
			for j := 0; j < 7; j++ {
				if board[i][j] == 1 && board[i+1][j] == 1 && board[i][j+1] == 1 && board[i+1][j+1] == 1 {
					ans = "A"
				}
			}
		}
		for i := 0; i < 5; i++ {
			for j := 0; j < 8; j++ {
				if board[i][j] == 1 && board[i+1][j] == 1 && board[i+2][j] == 1 && board[i+3][j] == 1 {
					ans = "B"
				}
			}
		}
		for i := 0; i < 8; i++ {
			for j := 0; j < 5; j++ {
				if board[i][j] == 1 && board[i][j+1] == 1 && board[i][j+2] == 1 && board[i][j+3] == 1 {
					ans = "C"
				}
			}
		}
		for i := 0; i < 6; i++ {
			for j := 0; j < 7; j++ {
				if board[i][j+1] == 1 && board[i+1][j] == 1 && board[i+1][j+1] == 1 && board[i+2][j] == 1 {
					ans = "D"
				}
			}
		}
		for i := 0; i < 7; i++ {
			for j := 0; j < 6; j++ {
				if board[i][j] == 1 && board[i][j+1] == 1 && board[i+1][j+1] == 1 && board[i+1][j+2] == 1 {
					ans = "E"
				}
			}
		}
		for i := 0; i < 7; i++ {
			for j := 0; j < 6; j++ {
				if board[i][j+1] == 1 && board[i][j+2] == 1 && board[i+1][j] == 1 && board[i+1][j+1] == 1 {
					ans = "G"
				}
			}
		}
		for i := 0; i < 6; i++ {
			for j := 0; j < 7; j++ {
				if board[i][j] == 1 && board[i+1][j] == 1 && board[i+1][j+1] == 1 && board[i+2][j+1] == 1 {
					ans = "F"
				}
			}
		}
		fmt.Println(ans)
	}
}

Python: ans = {"1100000011": "A", "1000000010000000100000001": "B",
       "1111": "C", "1000000110000001": "D",
       "11000000011": "E", "100000001100000001": "F", "0110000011": "G"}
while True:
    try:
        st = "".join([input() for _ in range(8)])

        st = st[st.find("1"): st.rfind("1")+1]
        for k, v in ans.items():
            if st == k:
                print(v)
                break
        input()
    except:
        break

Python: ans = {"1100000011": "A", "1000000010000000100000001": "B",
       "1111": "C", "1000000110000001": "D",
       "11000000011": "E", "100000001100000001": "F", "110000011": "G"}
while True:
    try:
        st = "".join([input() for _ in range(8)])

        st = st[st.find("1"): st.rfind("1")+1]
        for k, v in ans.items():
            if st == k:
                print(v)
                break
        input()
    except:
        break

Python: while True:
    try:
        string = [input() for _ in range(8)]
        string = [int(l) for line in string for l in line] + [0]*32
        one = string.index(1)
        s = string[one:]
        ones = [[1, 8, 9], [8, 16, 24], [1, 2, 3],
                [7, 8, 15], [1, 9, 10], [8, 9, 17], [1, 7, 8]]
        ans = {0: "A", 1: "B", 2: "C", 3: "D", 4: "E", 5: "F", 6: "G"}
        for k, o in enumerate(ones):
            if all([s[o[0]], s[o[1]], s[o[2]]]):
                print(ans[k])
        input()
    except:
        break

Python: # -*- coding: utf-8 -*-
figures = {
    'A': [['1', '1'], ['1', '1']],
    'B': [['1'], ['1'], ['1'], ['1']],
    'C': [['1', '1', '1', '1']],
    'D': [['0', '1'], ['1', '1'], ['1', '0']],
    'E': [['1', '1', '0'], ['0', '1', '1']],
    'F': [['1', '0'], ['1', '1'], ['0', '1']],
    'G': [['0', '1', '1'], ['1', '1', '0']],
}


def f1(lines):
    for n, figure in figures.items():
        found = f2(lines, figure)
        if found:
            print(n)
            break


def f2(lines, figure):
    height = len(figure)
    width = len(figure[0])
    for h in range(8 - height + 1):
        for w in range(8 - width + 1):
            found = f3(lines, figure, height, width, h, w)
            if found:
                return True


def f3(lines, figure, height, width, h, w):
    _figure = [[lines[h+_h][w+_w] for _w in range(width)]
               for _h in range(height)]
    if figure == _figure:
        return True


try:
    while True:
        f1([list(input()) for _ in range(8)])
except EOFError:
    pass

Python: while 1:
	try:
		pos=[]
		for i in xrange(8):
			s=raw_input()
			for j in xrange(8):
				if int(s[j])==1:
					pos.append([i,j])
		if pos[0][0]+1==pos[3][0] and pos[0][1]+1==pos[3][1]:
			print('A')
		elif pos[0][0]+3==pos[3][0]:
			print('B')
		elif pos[0][1]+3==pos[3][1]:
			print('C')
		elif pos[0][1]==pos[3][1]+1:
			print('D')
		elif pos[0][0]+1==pos[3][0] and pos[0][1]+2==pos[3][1]:
			print('E')
		else:
			print('F')
		raw_input()
	except:
		break

Python: maxl = 8

offsetV = ('A', 'B', 'C', 'D', 'E', 'F', 'G')
offset = (((0, 1), (1, 0), (1, 1)),
          ((0, 1), (0, 2), (0, 3)),
          ((1, 0), (2, 0), (3, 0)),
          ((0, 1), (-1, 1), (-1, 2)),
          ((1, 0), (1, 1), (2, 1)),
          ((0, 1), (1, 1), (1, 2)),
          ((1, 0), (-1, 1), (0, 1)),
          )


def match(l, x, y, oi):
    for offX, offY in [a for a in offset[oi]]:
        if 0 <= x + offX <= maxl and 0 <= y + offY < maxl:
            pass
        else:
            return False

        if l[y + offY][x + offX] == '0':
            return False
    return True


def solve():
    l = [input() for i in range(9)]
    for y in range(8):
        for x in range(8):
            if l[y][x] == '1':
                for o in range(7):
                    if match(l, x, y, o):
                        return offsetV[o]



try:
    while 1:
        print(solve())
except:
    pass

Python: while True:
    try:
        lst = []

        for i in range(8):
            lst += list(map(int, input()))

        cnt = 0
        for i in range(len(lst)):
            if lst[i]:
                cnt += i
        cnt -= lst.index(1) * 4

        if cnt == 18:
            ans = "A"
        elif cnt == 48:
            ans = "B"
        elif cnt == 6:
            ans = "C"
        elif cnt == 34:
            ans = "D"
        elif cnt == 20:
            ans = "E"
        elif cnt == 34:
            ans = "F"
        else:
            ans = "G"

        print(ans)
    except:
        break

Python: def trim(N):
    num=[]
    for x in range(8):
        for y in range(8):
            if N[y][x]=="1":
                if not num:
                    refer=(x,y)
                num.append((x,y))
    num=[(x-refer[0],y-refer[1]) for x,y in num]
    return num
def points(point):
    if point==[(0,0),(0,1),(1,0),(1,1)]:print("A")
    if point==[(0,0),(0,1),(0,2),(0,3)]:print("B")
    if point==[(0,0),(1,0),(2,0),(3,0)]:print("C")
    if point==[(0,0),(0,1),(1,-1),(1,0)]:print("D")
    if point==[(0,0),(1,0),(1,1),(2,1)]:print("E")
    if point==[(0,0),(0,1),(1,1),(1,2)]:print("F")
    if point==[(0,0),(1,-1),(1,0),(2,-1)]:print("G")
while True:
    try:
        N=[input() for _ in range(8)]
        points(trim(N))
    except:break

Python: from __future__ import (division, absolute_import, print_function,
                        unicode_literals)
from sys import stdin

def judge(height, indexes):
    if height == 1:
        return 'C'
    if height == 4:
        return 'B'
    idx0, idx1 = indexes
    if height == 2:
        return 'EAG'[1+idx0-idx1]
    if height == 3:
        return 'FD'[idx0-idx1]

while True:
    it = (stdin.readline() for _ in xrange(8))
    L = [line for line in it if line.count('1')]
    indexes = (L[i].index('1') for i in xrange(2))
    print(judge(len(L), indexes))
    if not stdin.readline():
        break