use strict;
use warnings;

my $line = <DATA>;

# Quick and dirty
# Greedily match anything from 1-70 characters
my @lines = $line =~ /.{1,70}/g;
print $_,"\n" for @lines;

# Less memory use for large blocks of text

while ($line =~ /(.{1,70})/g) {
    print $1,"\n";
}

__DATA__
1234567890123456789012345678901234567890123456789012345678901234567890
+123456789012345678901234567890123456789012345678901234567890123456789
+012345678901234567890123456789012345678901234567890123456789012345678
+901234567890123456789012345678901234567890123456789012345678901234567
+890123456789012345678901
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