Results

s = 'uostsinxnazdkvfinrrk'
Output:
Longest substring in alphabetical order is: finrr

s = 'jnpwwiensqjvjatygpokf'
Output:
Longest substring in alphabetical order is: jnpww

s = 'cppbyoayvdfjhtp'
Output:
Longest substring in alphabetical order is: cpp

s = 'rsekbgqwalgwxsmrp'
Output:
Longest substring in alphabetical order is: bgqw

s = 'ytslflraybyftqklldzy'
Output:
Longest substring in alphabetical order is: flr

s = 'bjaptgeagroibzqnv'
Output:
Longest substring in alphabetical order is: apt

s = 'jiahguggddjvuymnfakz'
Output:
Longest substring in alphabetical order is: ddjv

s = 'abcdefghijklmnopqrstuvwxyz'
Output:
Longest substring in alphabetical order is: abcdefghijklmnopqrstuvwxyz

s = 'hlkrfffnvmuckg'
Output:
Longest substring in alphabetical order is: fffnv

s = 'qzcbdakn'
Output:
Longest substring in alphabetical order is: akn

s = 'lqztlvefiafuufyd'
Output:
Longest substring in alphabetical order is: afuu

s = 'zyxwvutsrqponmlkjihgfedcba'
Output:
Longest substring in alphabetical order is: z

s = 'hnyjvddztsdoqp'
Output:
Longest substring in alphabetical order is: hny

s = 'kvavwdudfvksmqzynzmeyt'
Output:
Longest substring in alphabetical order is: avw

s = 'bcfjepgxgbnsbl'
Output:
Longest substring in alphabetical order is: bcfj

s = 'swocnjyssfbvhn'
Output:
Longest substring in alphabetical order is: sw

s = 'wlmckbvsgdsbzwmfbazvptb'
Output:
Longest substring in alphabetical order is: lm

s = 'ruuifmpoogpgfnrs'
Output:
Longest substring in alphabetical order is: fnrs

s = 'fgwymizkzupa'
Output:
Longest substring in alphabetical order is: fgwy

s = 'mbafcrvopfnjmbpjgngpsm'
Output:
Longest substring in alphabetical order is: crv