a = input()
keys = []
rings = []
for i in a:
    if a in keys:
        for x in range(len(keys)-1):
            if keys[x] == a:
                rings[x] += 1
                break
    else:
        keys.append(i)
n = 0
for i in range(len(rings)-1):
    if rings[i] % 2 == 1:
        n += 1
if  n < 2 or n % 2 == 1:
    print("First")
else:
    print("Second")

# Fri Oct 16 2020 11:25:42 GMT+0300 (Москва, стандартное время)
