a = "strongstring"
print(a[2])
print(a[2])
print(a[:5])
print(a[-2:])
for i in range(0, len(a), 2):
    print(a[i])
for i in range(1, len(a), 3):
    print(a[i])
print(a[::-1])
for i in range(len(a), -1, -1):
    print(a[i])
print(len(a))
