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 Geographic entities (Posted on 2015-04-20)
Letâ€™s take a certain word, change one letter in it and rearrange the letters to get another valid word .
Denote this operation by .
Examples: sport trips shirt

Find solutions fitting the following pattern:
Country I Capital I Country II
Capital II Country III Capital III

All the cities and countries above are 5-letter words.

 No Solution Yet Submitted by Ady TZIDON No Rating

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 computer assisted solution | Comment 1 of 3
Countries with their capitals were downloaded from Wikipeda, brought into a Spreadsheet and saved as a comma-delimited file to be perused by:

DECLARE FUNCTION except1! (a\$, b\$)
OPEN "cityco~1.txt" FOR INPUT AS #1
OPEN "city5.txt" FOR OUTPUT AS #2
OPEN "country5.txt" FOR OUTPUT AS #3
DO
LINE INPUT #1, l\$
ix = INSTR(l\$, ",")
IF ix > 5 THEN
city\$ = LTRIM\$(RTRIM\$(LEFT\$(l\$, ix - 1)))
l\$ = MID\$(l\$, ix + 1)
ix = INSTR(l\$, ",")
IF ix = 0 THEN ix = LEN(l\$) + 1
country\$ = LTRIM\$(RTRIM\$(LEFT\$(l\$, ix - 1)))
IF LEN(city\$) = 5 THEN PRINT #2, LCASE\$(city\$)
IF LEN(country\$) = 6 THEN PRINT #3, LCASE\$(MID\$(country\$, 2))
END IF
LOOP UNTIL EOF(1)
CLOSE

OPEN "city5.txt" FOR INPUT AS #1
OPEN "ccmatch4.txt" FOR OUTPUT AS #3
DO
INPUT #1, c\$
OPEN "country5.txt" FOR INPUT AS #2
DO
INPUT #2, n\$
IF except1(c\$, n\$) THEN PRINT #3, c\$, n\$
LOOP UNTIL EOF(2)
CLOSE 2
LOOP UNTIL EOF(1)
CLOSE 1

FUNCTION except1 (a\$, b\$)
x\$ = a\$: y\$ = b\$
FOR i = 1 TO LEN(y\$)
ix = INSTR(x\$, MID\$(y\$, i, 1))
IF ix THEN x\$ = LEFT\$(x\$, ix - 1) + MID\$(x\$, ix + 1)
NEXT i
IF LEN(x\$) = 1 THEN except1 = 1: EXIT FUNCTION
except1 = 0
END FUNCTION

finds this list of cities:

abuja
accra
alofi
amman
cairo
dakar
dhaka
hanoi
kabul
minsk
paris
praia
quito
rabat
seoul
sofia
tokyo
tunis

and this list of countries:

ghana
china
egypt
syria
sudan
gabon
spain
kenya
burma
india
palau
niger
tonga
aruba
haiti
benin
yemen
chile
japan
libya
malta
nauru

and finds these correlations:

`abuja         arubahanoi         chinaparis         syriaparis         spainrabat         aruba`

As Paris connects to Syria and Spain, and Aruba connects to Abuja and Rabat, the solutions are:

Syria --> Paris --> Spain
Abuja --> Aruba --> Rabat

Of course the direction in each case can be reversed.

 Posted by Charlie on 2015-04-20 15:28:27

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