Hi People,

I have a sequence of characters like:

AASSASDKASASDASFAFSASASADKASASAFPKQREWEAQEOKSPADAO EKOQPPDAOPSKAEPQ

This sequence must be put in cell A2.
Thus, I have to perform some specific operations in this text:

Example 1:
Rules:
a) Fragment the sequence before K but not always (you could have lost
cut).
b) Sequence is not cut if K is found before FP

Results:

AASSASDKASASDASFAFSASASADKASASAFPKQREWEAQEOKSPADAO EKOQPPDAOPSKAEPQ

0 lost cut = Cutting the sequence all the time in which K is present
(The subsequences of this process should be put in B column:
AASSASDK
ASASDASFAFSASASADK
ASASAFPKQREWEAQEOK
SPADAOEK
OQPPDAOPSK
AEPQ

1 lost cut = Cutting the sequence after the first K present in the
sequence (The subsequences of this process should be put in C column::
AASSASDKASASDASFAFSASASADK
ASASAFPKQREWEAQEOKSPADAOEK
OQPPDAOPSKAEPQ
AASSASDKASASDASFAFSASASADKASASAFPKQREWEAQEOK
SPADAOEKOQPPDAOPSKAEPQ

2 lost cut = = Cutting the sequence after the second K (just for the
third and following) present in the sequence (The subsequences of this
process should be put in D column:
AASSASDKASASDASFAFSASASADKASASAFPKQREWEAQEOK
SPADAOEKOQPPDAOPSKAEPQ

Repair that in some cases I need lost cuts in which you cut after 1, 2,
3, 4,... specific characters.
I have to specify such rules in some place of the sheet containing the
precursor text.
The rules a

Cut after "XXX" (In this example I have put K but the some cell in the
sheet must contain what is the character in which the sequence will be
fragmented). In some cases it could be more than only one character
(e.g. K and R; nor necessarily together)
Cut before "XXX" (The cut may be after like previous example or before
the character)

Never before "XXX" (In some cases I have prohibitive situations; e.g.
It must not cut a sequence in K if K is preceeded by P or by RP)
Never after "XXX" (Same for after)

Number of times that the character could be missed prior cut "XXX" (In
some place of the sheet I must explicit how many characters could be
"lost" prior cut.

Thanks in advance,
Luciano