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##################
#TASK DESCRIPTION#
##################

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##################
#FILE_A (sym.txt)#
##################

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```
A
AA
...
EFF
ZFF
ZZD
```

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###################
#FILE_B (data.txt)#
###################

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exchangeA_groupA.gateway_risk=A 10 10 AA 10 10 ABC 10 10 ADF 10 10 EFF
+ 10 10 MMM 10 10 NDB 10 10 RFD 10 10 ZFF 10 10
exchangeA_groupB.gateway_risk=A 10 10 AA 10 10 ABC 10 10 EFF 10 10 MMM
+ 10 10 NDB 10 10 RFD 10 10 ZFF 10 10
...
exchangeD_groupA.gateway_risk=A 10 10 AA 10 10 ABC 10 10 EFF 10 10 MMM
+ 10 10 RFD 10 10 ZFF 10 10
exchangeD_groupB.gateway_risk=A 10 10 AA 10 10 ABC 10 10 EFF 10 10 MMM
+ 10 10 NDB 10 10 RFD 10 10 ZFF 10 10
exchangeD_groupC.gateway_risk=A 10 10 AA 10 10 ABC 10 10 EFF 10 10 MMM
+ 10 10 NDB 10 10 RFD 10 10 ZFF 10 10

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```
###########
#MY SCRIPT#
###########
```

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#use warnings;
use strict;
...
        }
    }
}

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```
############
#MY RESULTS#
############
```

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A    exchangeB_groupA(ln4)    not found
A    exchangeC_groupA(ln7)    not found
...
BFD    exchangeB_groupA(ln4)    not found
BFD    exchangeC_groupA(ln7)    not found
ZZD    exchangeB_groupA(ln4)    not found