20260113
# data=[]
# n=int(input())
# for i in range(n):
# x=[0]*n
# data.append(x)
#
# k=1
# for j in range(n):
# for i in range(n):
# data[i][j]=k
# k+=1
#
# for i in range(len(data)):
# for j in range(len(data)):
# print(data[i][j],end=' ')
# print()
# 1524
# data = []
# data.append([0]*11)
# for i in range(9) :
# x = list(map(int,input().split()))
# x.insert(0,0)
# x.append(0)
# data.append(x)
# data.append([0]*11)
#
# r,c = map(int, input().split())
# if data[r][c]==1 :
# print('-1')
# else:
# k = data[r-1][c-1] + data[r-1][c] + data[r-1][c+1] +data[r][c-1] + data[r][c+1] + data[r+1][c-1] + data[r+1][c] + data[r+1][c+1]
# print(k)
data=[]
for i in range(11):
x=list(map(int,input().split()))
data.append(x)
for j in range(len(data[0])):
if data[10][j]==1:
for i in range(9,-1,-1):
if data[i][j]>0:
print('crash')
break
elif data[i][j]==0 and data[0]==data[]:
print('safe')
break
elif data[i][j]<0:
print('fall')
break
'''
safe 판정 추가
몇번째 말인지 출력 추가
'''