Два ближайших числа

a=list(map(int,input().split()))
p=[]
 
p=sorted(a)
 
p=list(map(int,p))
c=p[0]
c1=p[1]
for i in range(len(a)-1):
    if abs(p[i]-p[i+1])<abs(c-c1):
        c=p[i]
        c1=p[i+1]
        
key1=c
key2=c1
for i in range(len(a)):
    if a[i]==key1:
        ans_1=i
        break
for i1 in range(len(a)):
    if a[i1]==key2:
        if i1==i:
            continue
        else:
            ans_2=i1
            break
        
print(ans_1,ans_2)

from itertools import combinations
 
a = [7, 0, 4, 2, 5, 9]
 
result = min((i for i in combinations(a, 2)), key=lambda x: abs(x[1] - x[0]))
print(a.index(result[0]), a.index(result[1]))

a = [7, 0, 4, 2, 5, 9]
s = sorted(a)
 
result = min(((s[i], s[i +1]) for i in range(len(s) - 1)), key=lambda x: x[1] - x[0])
print(a.index(result[0]), a.index(result[1]))

ind_1 = a.index(result[0])
ind_n = ind_1 + 1
ind_2 = a[ind_n:].index(result[1]) + ind_n
print(ind_1, ind_2)

a = [7, 0, 4, 2, 5, 7, 9]
s = sorted(a)
 
result = min(((s[i], s[i +1]) for i in range(len(s) - 1)), key=lambda x: x[1] - x[0])
print(a.index(result[0]), a.index(result[1]))

a = [7, 0, 4, 2, 5, 7, 9]
s = sorted((v, i) for i, v in enumerate(a))
result = min([i for i in zip(s, s[1:])], key=lambda x: x[1][0] - x[0][0])
print(result[0][1], result[1][1])