Buggy python submission (verdict: Runtime Error):
s = input()
f = 0
a = 0; b = 0; c = 0
if len(s)==3 and s[0]==s[2]:
    print('Yes')
else :
    
    for i in range(len(s)//2):
        if s[i]==s[-1-i]:
            a += 1
        if a == len(s)//2:
            f += 1
    for i in range(len(s)//4):
        if s[i]==s[(len(s)-1)//2-1-i]:
            b += 1
        if b == len(s)//4:
            f += 1
        if s[(len(s)+3)//2-1+i]==s[len(s)-1+i]:
            c += 1
        if c == len(s)//4:
            f += 1
    print('Yes' if f == 3 else 'No')

Fixed submission:
s = input()
f = 0
a = 0; b = 0; c = 0
if len(s)==3 and s[0]==s[2]:
    print('Yes')
else :
    
    for i in range(len(s)//2):
        if s[i]==s[-1-i]:
            a += 1
        if a == len(s)//2:
            f += 1
    for i in range(len(s)//4):
        if s[i]==s[(len(s)-1)//2-1-i]:
            b += 1
        if b == len(s)//4:
            f += 1
        if s[(len(s)+3)//2-1+i]==s[len(s)-1-i]:
            c += 1
        if c == len(s)//4:
            f += 1
    print('Yes' if f == 3 else 'No')

Buggy python submission (verdict: Runtime Error):
s = input()
f = 0
a = 0; b = 0; c = 0
if len(s)==3 and s[0]==s[2]:
    print('Yes')
else :
    
    for i in range(len(s)//2):
        if s[i]==s[-1-i]:
            a += 1
        if a == len(s)//2:
            f += 1
    for i in range(len(s)//4):
        if s[i]==s[(len(s)-1)//2-1-i]:
            b += 1
        if b == len(s)//4:
            f += 1
        if s[(len(s)+3)//2-1+i]==s[len(s)-1+i]:
            c += 1
        if c == len(s)//4:
            f += 1
    print('Yes' if f == 3 else 'No')

Fixed submission:
s = input()
f = 0
a = 0; b = 0; c = 0
if len(s)==3 and s[0]==s[2]:
    print('Yes')
else :
    
    for i in range(len(s)//2):
        if s[i]==s[-1-i]:
            a += 1
        if a == len(s)//2:
            f += 1
    for i in range(len(s)//4):
        if s[i]==s[(len(s)-1)//2-1-i]:
            b += 1
        if b == len(s)//4:
            f += 1
        if s[(len(s)+3)//2-1+i]==s[len(s)-1-i]:
            c += 1
        if c == len(s)//4:
            f += 1
    print('Yes' if f == 3 else 'No')

Buggy python submission (verdict: Runtime Error):
s = input()
f = 0
a = 0; b = 0; c = 0
if len(s)==3 and len(set(s))==1:
    print('Yes')
else :
    
    for i in range(len(s)//2):
        if s[i]==s[-1-i]:
            a += 1
            if a == len(s)//2:
                f += 1
    for i in range(len(s)//4):
        if s[i]==s[(len(s)-1)//2-1-i]:
            b += 1
        if b == len(s)//4:
            f += 1
        if s[(len(s)+3)//2-1+i]==s[len(s)-1+i]:
            c += 1
        if c == len(s)//4:
            f += 1
    print('Yes' if f == 3 else 'No')
    

Fixed submission:
s = input()
f = 0
a = 0; b = 0; c = 0
if len(s)==3 and s[0]==s[2]:
    print('Yes')
else :
    
    for i in range(len(s)//2):
        if s[i]==s[-1-i]:
            a += 1
        if a == len(s)//2:
            f += 1
    for i in range(len(s)//4):
        if s[i]==s[(len(s)-1)//2-1-i]:
            b += 1
        if b == len(s)//4:
            f += 1
        if s[(len(s)+3)//2-1+i]==s[len(s)-1-i]:
            c += 1
        if c == len(s)//4:
            f += 1
    print('Yes' if f == 3 else 'No')

Buggy python submission (verdict: Runtime Error):
s = input()
f = 0
a = 0; b = 0; c = 0
for i in range(len(s)//2):
    if s[i]==s[-1-i]:
        a += 1
    if a == len(s)//2:
        f += 1
for i in range(len(s)//4):
    if s[i]==s[(len(s)-1)//2-1-i]:
        b += 1
    if b == len(s)//4:
        f += 1
    if s[(len(s)+3)//2-1+i]==s[len(s)-1+i]:
        c += 1
    if c == len(s)//4:
        f += 1
print('Yes' if f == 3 else 'No')

Fixed submission:
s = input()
f = 0
a = 0; b = 0; c = 0
if len(s)==3 and s[0]==s[2]:
    print('Yes')
else :
    
    for i in range(len(s)//2):
        if s[i]==s[-1-i]:
            a += 1
        if a == len(s)//2:
            f += 1
    for i in range(len(s)//4):
        if s[i]==s[(len(s)-1)//2-1-i]:
            b += 1
        if b == len(s)//4:
            f += 1
        if s[(len(s)+3)//2-1+i]==s[len(s)-1-i]:
            c += 1
        if c == len(s)//4:
            f += 1
    print('Yes' if f == 3 else 'No')