#p=[23,45,-31,-3,89,7,4,-2,4,56,-227,43]
p=[2,4,-5,8]
#p=[-3,-56,-38]
#p=[-2,-4,45,3,-7]
#p=[65,-2,-3,-4,-5,77]
n=range(len(p))
a=p[2:]
b=p[1:]
c=p[1:2]
d=p[1:3]
e=p[:1]
f=p[:2]
g=p[1:-1]
h=p[1:-2]
i=p[1:-3]
j=p[-3:-1]
k=p[1:-4]
print 'a',a
print 'b',b
print 'c',c
print 'd',d
print 'e',e
print 'f',f
print 'g',g
print 'h',h
print 'i',i
print 'j',j
print 'k',k